25042457 has 12 divisors (see below), whose sum is σ = 28304016. Its totient is φ = 21972720.

The previous prime is 25042441. The next prime is 25042471. The reversal of 25042457 is 75424052.

It is a happy number.

It is not a de Polignac number, because 25042457 - 2⁴ = 25042441 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25042477) 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, 7898 + ... + 10604.

It is an arithmetic number, because the mean of its divisors is an integer number (2358668).

Almost surely, 2^25042457 is an apocalyptic number.

It is an amenable number.

25042457 is a deficient number, since it is larger than the sum of its proper divisors (3261559).

25042457 is a wasteful number, since it uses less digits than its factorization.

25042457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 25042457 is about 5004.2438989322. The cubic root of 25042457 is about 292.5672069009.

The spelling of 25042457 in words is "twenty-five million, forty-two thousand, four hundred fifty-seven".