25312261 has 8 divisors (see below), whose sum is σ = 27588960. Its totient is φ = 23082672.

The previous prime is 25312253. The next prime is 25312267. The reversal of 25312261 is 16221352.

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 25312261 - 2³ = 25312253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25312267) 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, 10651 + ... + 12808.

It is an arithmetic number, because the mean of its divisors is an integer number (3448620).

Almost surely, 2^25312261 is an apocalyptic number.

It is an amenable number.

25312261 is a deficient number, since it is larger than the sum of its proper divisors (2276699).

25312261 is a wasteful number, since it uses less digits than its factorization.

25312261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23555.

The product of its digits is 720, while the sum is 22.

The square root of 25312261 is about 5031.1291973075. The cubic root of 25312261 is about 293.6141489827.

Subtracting from 25312261 its reverse (16221352), we obtain a palindrome (9090909).

The spelling of 25312261 in words is "twenty-five million, three hundred twelve thousand, two hundred sixty-one".