25321965 has 32 divisors (see below), whose sum is σ = 44513280. Its totient is φ = 12234816.

The previous prime is 25321963. The next prime is 25321973. The reversal of 25321965 is 56912352.

It is not a de Polignac number, because 25321965 - 2¹ = 25321963 is a prime.

It is a super-2 number, since 2×25321965² = 1282403822922450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25321963) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4624 + ... + 8486.

It is an arithmetic number, because the mean of its divisors is an integer number (1391040).

Almost surely, 2^25321965 is an apocalyptic number.

It is an amenable number.

25321965 is a deficient number, since it is larger than the sum of its proper divisors (19191315).

25321965 is a wasteful number, since it uses less digits than its factorization.

25321965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3913.

The product of its digits is 16200, while the sum is 33.

The square root of 25321965 is about 5032.0935007211. The cubic root of 25321965 is about 293.6516652898.

The spelling of 25321965 in words is "twenty-five million, three hundred twenty-one thousand, nine hundred sixty-five".