25517942 has 4 divisors (see below), whose sum is σ = 38276916. Its totient is φ = 12758970.

The previous prime is 25517911. The next prime is 25517957. The reversal of 25517942 is 24971552.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6379484 + ... + 6379487.

It is an arithmetic number, because the mean of its divisors is an integer number (9569229).

Almost surely, 2^25517942 is an apocalyptic number.

25517942 is a deficient number, since it is larger than the sum of its proper divisors (12758974).

25517942 is a wasteful number, since it uses less digits than its factorization.

25517942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12758973.

The product of its digits is 25200, while the sum is 35.

The square root of 25517942 is about 5051.5286795187. The cubic root of 25517942 is about 294.4072825639.

The spelling of 25517942 in words is "twenty-five million, five hundred seventeen thousand, nine hundred forty-two".