25739965 has 16 divisors (see below), whose sum is σ = 33638400. Its totient is φ = 18833472.

The previous prime is 25739939. The next prime is 25739969. The reversal of 25739965 is 56993752.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25739965 - 2⁷ = 25739837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25739969) 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, 1917 + ... + 7426.

It is an arithmetic number, because the mean of its divisors is an integer number (2102400).

Almost surely, 2^25739965 is an apocalyptic number.

It is an amenable number.

25739965 is a deficient number, since it is larger than the sum of its proper divisors (7898435).

25739965 is a wasteful number, since it uses less digits than its factorization.

25739965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9396.

The product of its digits is 510300, while the sum is 46.

The square root of 25739965 is about 5073.4569082628. The cubic root of 25739965 is about 295.2586642529.

The spelling of 25739965 in words is "twenty-five million, seven hundred thirty-nine thousand, nine hundred sixty-five".