25974397 has 4 divisors (see below), whose sum is σ = 25991680. Its totient is φ = 25957116.

The previous prime is 25974379. The next prime is 25974413. The reversal of 25974397 is 79347952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25974397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25974307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6147 + ... + 9472.

It is an arithmetic number, because the mean of its divisors is an integer number (6497920).

Almost surely, 2^25974397 is an apocalyptic number.

It is an amenable number.

25974397 is a deficient number, since it is larger than the sum of its proper divisors (17283).

25974397 is a wasteful number, since it uses less digits than its factorization.

25974397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17282.

The product of its digits is 476280, while the sum is 46.

The square root of 25974397 is about 5096.5083145228. The cubic root of 25974397 is about 296.1523328698.

The spelling of 25974397 in words is "twenty-five million, nine hundred seventy-four thousand, three hundred ninety-seven".