12520438 has 16 divisors (see below), whose sum is σ = 21511584. Its totient is φ = 5353920.

The previous prime is 12520421. The next prime is 12520447. The reversal of 12520438 is 83402521.

It is a super-2 number, since 2×12520438² = 313522735423688, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8818 + ... + 10138.

It is an arithmetic number, because the mean of its divisors is an integer number (1344474).

Almost surely, 2^12520438 is an apocalyptic number.

12520438 is a deficient number, since it is larger than the sum of its proper divisors (8991146).

12520438 is a wasteful number, since it uses less digits than its factorization.

12520438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 12520438 is about 3538.4230951089. The cubic root of 12520438 is about 232.2058591965.

Adding to 12520438 its reverse (83402521), we get a palindrome (95922959).

The spelling of 12520438 in words is "twelve million, five hundred twenty thousand, four hundred thirty-eight".