25952591 has 12 divisors (see below), whose sum is σ = 31472208. Its totient is φ = 20891712.

The previous prime is 25952587. The next prime is 25952599. The reversal of 25952591 is 19525952.

It is not a de Polignac number, because 25952591 - 2² = 25952587 is a prime.

It is a super-2 number, since 2×25952591² = 1347073959226562, 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 (25952599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55340 + ... + 55806.

It is an arithmetic number, because the mean of its divisors is an integer number (2622684).

Almost surely, 2^25952591 is an apocalyptic number.

25952591 is a deficient number, since it is larger than the sum of its proper divisors (5519617).

25952591 is an frugal number, since it uses more digits than its factorization.

25952591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 958 (or 491 counting only the distinct ones).

The product of its digits is 40500, while the sum is 38.

The square root of 25952591 is about 5094.3685575349. The cubic root of 25952591 is about 296.0694344963.

The spelling of 25952591 in words is "twenty-five million, nine hundred fifty-two thousand, five hundred ninety-one".