25964521 has 8 divisors (see below), whose sum is σ = 29016288. Its totient is φ = 23028000.

The previous prime is 25964509. The next prime is 25964531. The reversal of 25964521 is 12546952.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 25964521 - 2¹¹ = 25962473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25964501) 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, 28335 + ... + 29236.

It is an arithmetic number, because the mean of its divisors is an integer number (3627036).

Almost surely, 2^25964521 is an apocalyptic number.

It is an amenable number.

25964521 is a deficient number, since it is larger than the sum of its proper divisors (3051767).

25964521 is a wasteful number, since it uses less digits than its factorization.

25964521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57623.

The product of its digits is 21600, while the sum is 34.

The square root of 25964521 is about 5095.5393237615. The cubic root of 25964521 is about 296.1147937088.

Subtracting from 25964521 its reverse (12546952), we obtain a square (13417569 = 3663²).

It can be divided in two parts, 259645 and 21, that multiplied together give a palindrome (5452545).

The spelling of 25964521 in words is "twenty-five million, nine hundred sixty-four thousand, five hundred twenty-one".