25536261 has 16 divisors (see below), whose sum is σ = 36154944. Its totient is φ = 15976704.

The previous prime is 25536257. The next prime is 25536263. The reversal of 25536261 is 16263552.

It is not a de Polignac number, because 25536261 - 2² = 25536257 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25536263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29511 + ... + 30363.

It is an arithmetic number, because the mean of its divisors is an integer number (2259684).

Almost surely, 2^25536261 is an apocalyptic number.

It is an amenable number.

25536261 is a deficient number, since it is larger than the sum of its proper divisors (10618683).

25536261 is a wasteful number, since it uses less digits than its factorization.

25536261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460.

The product of its digits is 10800, while the sum is 30.

The square root of 25536261 is about 5053.3415677154. The cubic root of 25536261 is about 294.4777161036.

Subtracting from 25536261 its sum of digits (30), we obtain a triangular number (25536231 = T₇₁₄₆).

The spelling of 25536261 in words is "twenty-five million, five hundred thirty-six thousand, two hundred sixty-one".