25912971 has 24 divisors (see below), whose sum is σ = 42922464. Its totient is φ = 14757120.

The previous prime is 25912967. The next prime is 25913009. The reversal of 25912971 is 17921952.

It is not a de Polignac number, because 25912971 - 2² = 25912967 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25912951) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 26035 + ... + 27011.

It is an arithmetic number, because the mean of its divisors is an integer number (1788436).

Almost surely, 2^25912971 is an apocalyptic number.

25912971 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

25912971 is a deficient number, since it is larger than the sum of its proper divisors (17009493).

25912971 is a wasteful number, since it uses less digits than its factorization.

25912971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411 (or 1408 counting only the distinct ones).

The product of its digits is 11340, while the sum is 36.

The square root of 25912971 is about 5090.4784647418. The cubic root of 25912971 is about 295.9186949507.

The spelling of 25912971 in words is "twenty-five million, nine hundred twelve thousand, nine hundred seventy-one".