25718291 has 2 divisors, whose sum is σ = 25718292. Its totient is φ = 25718290.

The previous prime is 25718281. The next prime is 25718309. The reversal of 25718291 is 19281752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25718291 - 2⁶ = 25718227 is a prime.

It is a super-2 number, since 2×25718291² = 1322860983921362, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25718221) 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 as a sum of consecutive naturals, namely, 12859145 + 12859146.

It is an arithmetic number, because the mean of its divisors is an integer number (12859146).

Almost surely, 2^25718291 is an apocalyptic number.

25718291 is a deficient number, since it is larger than the sum of its proper divisors (1).

25718291 is an equidigital number, since it uses as much as digits as its factorization.

25718291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 35.

The square root of 25718291 is about 5071.3204394911. The cubic root of 25718291 is about 295.1757680858.

The spelling of 25718291 in words is "twenty-five million, seven hundred eighteen thousand, two hundred ninety-one".