12500840 has 32 divisors (see below), whose sum is σ = 30684960. Its totient is φ = 4545600.

The previous prime is 12500821. The next prime is 12500849. The reversal of 12500840 is 4800521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (12500849) 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, 13766 + ... + 14645.

It is an arithmetic number, because the mean of its divisors is an integer number (958905).

Almost surely, 2^12500840 is an apocalyptic number.

12500840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12500840 is an abundant number, since it is smaller than the sum of its proper divisors (18184120).

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

12500840 is a wasteful number, since it uses less digits than its factorization.

12500840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28433 (or 28429 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 12500840 is about 3535.6526978763. The cubic root of 12500840 is about 232.0846401437.

The spelling of 12500840 in words is "twelve million, five hundred thousand, eight hundred forty".