number.wiki
Number

2,621

2,621 is a prime, odd.

Cousin Prime Deficient Number Prime Squarefree

Properties

Parity
Odd
Digit count
4
Digit sum
11
Digital root
2
Palindrome
No
Divisor count
2
σ(n) — sum of divisors
2,622

Primality

2,621 is prime. It has exactly two divisors: 1 and itself.

Divisors & multiples

All divisors (2)
1 · 2621
Aliquot sum (sum of proper divisors): 1
Factor pairs (a × b = 2,621)
1 × 2621
First multiples
2,621 · 5,242 · 7,863 · 10,484 · 13,105 · 15,726 · 18,347 · 20,968 · 23,589 · 26,210

Representations

In words
two thousand six hundred twenty-one
Ordinal
2621st
Roman numeral
MMDCXXI
Binary
101000111101
Octal
5075
Hexadecimal
A3D

Also seen as

Prime neighborhood

Adjacent primes:

  • Previous prime: 2,617 (gap of 4)
  • Next prime: 2,633 (gap of 12)

Pair status: cousin with 2617.

Hex color
#000A3D
RGB(0, 10, 61)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.10.61.