12520390 has 16 divisors (see below), whose sum is σ = 22919760. Its totient is φ = 4923040.

The previous prime is 12520379. The next prime is 12520399. The reversal of 12520390 is 9302521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520399) 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, 10021 + ... + 11200.

It is an arithmetic number, because the mean of its divisors is an integer number (1432485).

Almost surely, 2^12520390 is an apocalyptic number.

12520390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12520390 is a deficient number, since it is larger than the sum of its proper divisors (10399370).

12520390 is a wasteful number, since it uses less digits than its factorization.

12520390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21287.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 12520390 is about 3538.4163124200. The cubic root of 12520390 is about 232.2055624578.

The spelling of 12520390 in words is "twelve million, five hundred twenty thousand, three hundred ninety".