22641 has 4 divisors (see below), whose sum is σ = 30192. Its totient is φ = 15092.

The previous prime is 22639. The next prime is 22643. The reversal of 22641 is 14622.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (22639) and next prime (22643).

It is a cyclic number.

It is not a de Polignac number, because 22641 - 2¹ = 22639 is a prime.

It is a super-2 number, since 2×22641² = 1025229762, which contains 22 as substring.

It is a D-number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 22641.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 22641.

It is not an unprimeable number, because it can be changed into a prime (22643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3771 + ... + 3776.

It is an arithmetic number, because the mean of its divisors is an integer number (7548).

2²²⁶⁴¹ is an apocalyptic number.

It is an amenable number.

22641 is a deficient number, since it is larger than the sum of its proper divisors (7551).

22641 is an equidigital number, since it uses as much as digits as its factorization.

22641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7550.

The product of its digits is 96, while the sum is 15.

The square root of 22641 is about 150.4692659648. The cubic root of 22641 is about 28.2899296996.

The spelling of 22641 in words is "twenty-two thousand, six hundred forty-one".