12624391 has 8 divisors (see below), whose sum is σ = 13623120. Its totient is φ = 11629632.

The previous prime is 12624389. The next prime is 12624419. The reversal of 12624391 is 19342621.

12624391 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12624391 - 2¹ = 12624389 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 (12624301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11880 + ... + 12898.

It is an arithmetic number, because the mean of its divisors is an integer number (1702890).

Almost surely, 2^12624391 is an apocalyptic number.

12624391 is a deficient number, since it is larger than the sum of its proper divisors (998729).

12624391 is a wasteful number, since it uses less digits than its factorization.

12624391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1985.

The product of its digits is 2592, while the sum is 28.

The square root of 12624391 is about 3553.0819016735. The cubic root of 12624391 is about 232.8467312788.

It can be divided in two parts, 12 and 624391, that added together give a triangular number (624403 = T₁₁₁₇).

The spelling of 12624391 in words is "twelve million, six hundred twenty-four thousand, three hundred ninety-one".