12497640 has 32 divisors (see below), whose sum is σ = 37493280. Its totient is φ = 3332672.

The previous prime is 12497627. The next prime is 12497651. The reversal of 12497640 is 4679421.

It is a happy 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, 51954 + ... + 52193.

It is an arithmetic number, because the mean of its divisors is an integer number (1171665).

Almost surely, 2^12497640 is an apocalyptic number.

12497640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12497640 is an abundant number, since it is smaller than the sum of its proper divisors (24995640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12497640 is a wasteful number, since it uses less digits than its factorization.

12497640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104161 (or 104157 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 12497640 is about 3535.2001357773. The cubic root of 12497640 is about 232.0648352285.

The spelling of 12497640 in words is "twelve million, four hundred ninety-seven thousand, six hundred forty".