12624109 has 4 divisors (see below), whose sum is σ = 12797116. Its totient is φ = 12451104.

The previous prime is 12624103. The next prime is 12624127. The reversal of 12624109 is 90142621.

12624109 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6646084 + 5978025 = 2578^2 + 2445^2 .

It is a cyclic number.

It is not a de Polignac number, because 12624109 - 2⁷ = 12623981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12624103) 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, 86394 + ... + 86539.

It is an arithmetic number, because the mean of its divisors is an integer number (3199279).

Almost surely, 2^12624109 is an apocalyptic number.

It is an amenable number.

12624109 is a deficient number, since it is larger than the sum of its proper divisors (173007).

12624109 is an equidigital number, since it uses as much as digits as its factorization.

12624109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173006.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 12624109 is about 3553.0422175933. The cubic root of 12624109 is about 232.8449975115.

The spelling of 12624109 in words is "twelve million, six hundred twenty-four thousand, one hundred nine".