12624321 has 4 divisors (see below), whose sum is σ = 16832432. Its totient is φ = 8416212.

The previous prime is 12624307. The next prime is 12624331. The reversal of 12624321 is 12342621.

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 not a de Polignac number, because 12624321 - 2⁶ = 12624257 is a prime.

It is a super-2 number, since 2×12624321² = 318746961422082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12624301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2104051 + ... + 2104056.

It is an arithmetic number, because the mean of its divisors is an integer number (4208108).

Almost surely, 2^12624321 is an apocalyptic number.

It is an amenable number.

12624321 is a deficient number, since it is larger than the sum of its proper divisors (4208111).

12624321 is an equidigital number, since it uses as much as digits as its factorization.

12624321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4208110.

The product of its digits is 576, while the sum is 21.

The square root of 12624321 is about 3553.0720510567. The cubic root of 12624321 is about 232.8463009134.

Adding to 12624321 its reverse (12342621), we get a palindrome (24966942).

The spelling of 12624321 in words is "twelve million, six hundred twenty-four thousand, three hundred twenty-one".