25918971 has 8 divisors (see below), whose sum is σ = 37217040. Its totient is φ = 15950112.

The previous prime is 25918943. The next prime is 25918987. The reversal of 25918971 is 17981952.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25918971 - 2⁷ = 25918843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25911971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 332256 + ... + 332333.

It is an arithmetic number, because the mean of its divisors is an integer number (4652130).

Almost surely, 2^25918971 is an apocalyptic number.

25918971 is a deficient number, since it is larger than the sum of its proper divisors (11298069).

25918971 is a wasteful number, since it uses less digits than its factorization.

25918971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664605.

The product of its digits is 45360, while the sum is 42.

The square root of 25918971 is about 5091.0677661960. The cubic root of 25918971 is about 295.9415326144.

The spelling of 25918971 in words is "twenty-five million, nine hundred eighteen thousand, nine hundred seventy-one".