25457997 has 8 divisors (see below), whose sum is σ = 33967360. Its totient is φ = 16960320.

The previous prime is 25457983. The next prime is 25458001. The reversal of 25457997 is 79975452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25457997 - 2⁶ = 25457933 is a prime.

It is a super-2 number, since 2×25457997² = 1296219222504018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25457977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6597 + ... + 9717.

It is an arithmetic number, because the mean of its divisors is an integer number (4245920).

Almost surely, 2^25457997 is an apocalyptic number.

It is an amenable number.

25457997 is a deficient number, since it is larger than the sum of its proper divisors (8509363).

25457997 is a wasteful number, since it uses less digits than its factorization.

25457997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5843.

The product of its digits is 793800, while the sum is 48.

The square root of 25457997 is about 5045.5918384269. The cubic root of 25457997 is about 294.1765680081.

The spelling of 25457997 in words is "twenty-five million, four hundred fifty-seven thousand, nine hundred ninety-seven".