25972405 has 16 divisors (see below), whose sum is σ = 32659200. Its totient is φ = 19790848.

The previous prime is 25972391. The next prime is 25972417. The reversal of 25972405 is 50427952.

It is a cyclic number.

It is not a de Polignac number, because 25972405 - 2²¹ = 23875253 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51384 + ... + 51886.

It is an arithmetic number, because the mean of its divisors is an integer number (2041200).

Almost surely, 2^25972405 is an apocalyptic number.

It is an amenable number.

25972405 is a deficient number, since it is larger than the sum of its proper divisors (6686795).

25972405 is a wasteful number, since it uses less digits than its factorization.

25972405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 25972405 is about 5096.3128828595. The cubic root of 25972405 is about 296.1447619461.

The spelling of 25972405 in words is "twenty-five million, nine hundred seventy-two thousand, four hundred five".