12622621 has 4 divisors (see below), whose sum is σ = 13770144. Its totient is φ = 11475100.

The previous prime is 12622609. The next prime is 12622633.

12622621 is nontrivially palindromic in base 10.

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 (12622609) and next prime (12622633).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12622621 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12622592 and 12622601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12622601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 573745 + ... + 573766.

It is an arithmetic number, because the mean of its divisors is an integer number (3442536).

Almost surely, 2^12622621 is an apocalyptic number.

12622621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12622621 is a deficient number, since it is larger than the sum of its proper divisors (1147523).

12622621 is a wasteful number, since it uses less digits than its factorization.

12622621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1147522.

The product of its digits is 576, while the sum is 22.

The square root of 12622621 is about 3552.8328134040. The cubic root of 12622621 is about 232.8358486950.

It can be divided in two parts, 1262 and 2621, that added together give a palindrome (3883).

The spelling of 12622621 in words is "twelve million, six hundred twenty-two thousand, six hundred twenty-one".