25207140 has 48 divisors (see below), whose sum is σ = 80664192. Its totient is φ = 5761536.

The previous prime is 25207139. The next prime is 25207157. The reversal of 25207140 is 4170252.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 29589 + ... + 30428.

It is an arithmetic number, because the mean of its divisors is an integer number (1680504).

Almost surely, 2^25207140 is an apocalyptic number.

25207140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25207140 is an abundant number, since it is smaller than the sum of its proper divisors (55457052).

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

25207140 is a wasteful number, since it uses less digits than its factorization.

25207140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60036 (or 60034 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 25207140 is about 5020.6712698602. The cubic root of 25207140 is about 293.2071283305.

Adding to 25207140 its reverse (4170252), we get a palindrome (29377392).

The spelling of 25207140 in words is "twenty-five million, two hundred seven thousand, one hundred forty".