25140987 has 12 divisors (see below), whose sum is σ = 36723960. Its totient is φ = 16571808.

The previous prime is 25140937. The next prime is 25141043. The reversal of 25140987 is 78904152.

It is not a de Polignac number, because 25140987 - 2⁶ = 25140923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25140937) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14893 + ... + 16494.

It is an arithmetic number, because the mean of its divisors is an integer number (3060330).

Almost surely, 2^25140987 is an apocalyptic number.

25140987 is a deficient number, since it is larger than the sum of its proper divisors (11582973).

25140987 is a wasteful number, since it uses less digits than its factorization.

25140987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31482 (or 31479 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 25140987 is about 5014.0788785180. The cubic root of 25140987 is about 292.9504084240.

The spelling of 25140987 in words is "twenty-five million, one hundred forty thousand, nine hundred eighty-seven".