25291965 has 16 divisors (see below), whose sum is σ = 40603968. Its totient is φ = 13443456.

The previous prime is 25291951. The next prime is 25292017. The reversal of 25291965 is 56919252.

It is not a de Polignac number, because 25291965 - 2⁴ = 25291949 is a prime.

It is a super-2 number, since 2×25291965² = 1279366987122450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2002 + ... + 7388.

It is an arithmetic number, because the mean of its divisors is an integer number (2537748).

Almost surely, 2^25291965 is an apocalyptic number.

It is an amenable number.

25291965 is a deficient number, since it is larger than the sum of its proper divisors (15312003).

25291965 is a wasteful number, since it uses less digits than its factorization.

25291965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5708.

The product of its digits is 48600, while the sum is 39.

The square root of 25291965 is about 5029.1117505977. Note that the first 3 decimals coincide. The cubic root of 25291965 is about 293.5356522913.

The spelling of 25291965 in words is "twenty-five million, two hundred ninety-one thousand, nine hundred sixty-five".