25916261 has 4 divisors (see below), whose sum is σ = 29618592. Its totient is φ = 22213932.

The previous prime is 25916257. The next prime is 25916263. The reversal of 25916261 is 16261952.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25916261 - 2² = 25916257 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 (25916263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1851155 + ... + 1851168.

It is an arithmetic number, because the mean of its divisors is an integer number (7404648).

Almost surely, 2^25916261 is an apocalyptic number.

It is an amenable number.

25916261 is a deficient number, since it is larger than the sum of its proper divisors (3702331).

25916261 is an equidigital number, since it uses as much as digits as its factorization.

25916261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3702330.

The product of its digits is 6480, while the sum is 32.

The square root of 25916261 is about 5090.8016068199. The cubic root of 25916261 is about 295.9312180395.

The spelling of 25916261 in words is "twenty-five million, nine hundred sixteen thousand, two hundred sixty-one".