number.wiki
Number

87,121

87,121 is a prime, odd.

Deficient Number Prime Squarefree Twin Prime

Properties

Parity
Odd
Digit count
5
Digit sum
19
Digital root
1
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
87,122

Primality

87,121 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 87121
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 87,121)
1 × 87121
First multiples
87,121 · 174,242 · 261,363 · 348,484 · 435,605 · 522,726 · 609,847 · 696,968 · 784,089 · 871,210

Representations

In words
eighty-seven thousand one hundred twenty-one
Ordinal
87121st
Binary
10101010001010001
Octal
252121
Hexadecimal
15451

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 87,119 (gap of 2)
  • Next prime: 87,133 (gap of 12)

Pair status: twin with 87119.

Hex color
#015451
RGB(1, 84, 81)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.1.84.81.