25972491 has 16 divisors (see below), whose sum is σ = 35458560. Its totient is φ = 16904160.

The previous prime is 25972489. The next prime is 25972517. The reversal of 25972491 is 19427952.

It is not a de Polignac number, because 25972491 - 2¹ = 25972489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25972421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60046 + ... + 60476.

It is an arithmetic number, because the mean of its divisors is an integer number (2216160).

Almost surely, 2^25972491 is an apocalyptic number.

25972491 is a deficient number, since it is larger than the sum of its proper divisors (9486069).

25972491 is a wasteful number, since it uses less digits than its factorization.

25972491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866.

The product of its digits is 45360, while the sum is 39.

The square root of 25972491 is about 5096.3213203251. The cubic root of 25972491 is about 296.1450888113.

The spelling of 25972491 in words is "twenty-five million, nine hundred seventy-two thousand, four hundred ninety-one".