25256140 has 48 divisors (see below), whose sum is σ = 65282112. Its totient is φ = 7992576.

The previous prime is 25256137. The next prime is 25256167. The reversal of 25256140 is 4165252.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5119 + ... + 8758.

It is an arithmetic number, because the mean of its divisors is an integer number (1360044).

Almost surely, 2^25256140 is an apocalyptic number.

25256140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25256140 is an abundant number, since it is smaller than the sum of its proper divisors (40025972).

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

25256140 is a wasteful number, since it uses less digits than its factorization.

25256140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13906 (or 13904 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 25256140 is about 5025.5487262587. The cubic root of 25256140 is about 293.3969931852.

The spelling of 25256140 in words is "twenty-five million, two hundred fifty-six thousand, one hundred forty".