25072291 has 4 divisors (see below), whose sum is σ = 25605792. Its totient is φ = 24538792.

The previous prime is 25072283. The next prime is 25072319. The reversal of 25072291 is 19227052.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25072291 - 2³ = 25072283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25072261) 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, 266680 + ... + 266773.

It is an arithmetic number, because the mean of its divisors is an integer number (6401448).

Almost surely, 2^25072291 is an apocalyptic number.

25072291 is a deficient number, since it is larger than the sum of its proper divisors (533501).

25072291 is an equidigital number, since it uses as much as digits as its factorization.

25072291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533500.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 25072291 is about 5007.2238815535. The cubic root of 25072291 is about 292.6833428185.

The spelling of 25072291 in words is "twenty-five million, seventy-two thousand, two hundred ninety-one".