25165261 has 8 divisors (see below), whose sum is σ = 27726048. Its totient is φ = 22650000.

The previous prime is 25165241. The next prime is 25165279. The reversal of 25165261 is 16256152.

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 25165261 - 2⁹ = 25164749 is a prime.

It is a super-2 number, since 2×25165261² = 1266580722396242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25165241) 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, 10215 + ... + 12436.

It is an arithmetic number, because the mean of its divisors is an integer number (3465756).

Almost surely, 2^25165261 is an apocalyptic number.

It is an amenable number.

25165261 is a deficient number, since it is larger than the sum of its proper divisors (2560787).

25165261 is a wasteful number, since it uses less digits than its factorization.

25165261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22763.

The product of its digits is 3600, while the sum is 28.

The square root of 25165261 is about 5016.4988787002. The cubic root of 25165261 is about 293.0446607674.

It can be divided in two parts, 2516 and 5261, that added together give a palindrome (7777).

The spelling of 25165261 in words is "twenty-five million, one hundred sixty-five thousand, two hundred sixty-one".