25715791 has 2 divisors, whose sum is σ = 25715792. Its totient is φ = 25715790.

The previous prime is 25715743. The next prime is 25715801. The reversal of 25715791 is 19751752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25715791 - 2⁹ = 25715279 is a prime.

It is a super-2 number, since 2×25715791² = 1322603813511362, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25715791.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25715741) 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, 12857895 + 12857896.

It is an arithmetic number, because the mean of its divisors is an integer number (12857896).

Almost surely, 2^25715791 is an apocalyptic number.

25715791 is a deficient number, since it is larger than the sum of its proper divisors (1).

25715791 is an equidigital number, since it uses as much as digits as its factorization.

25715791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22050, while the sum is 37.

The square root of 25715791 is about 5071.0739493721. The cubic root of 25715791 is about 295.1662033843.

The spelling of 25715791 in words is "twenty-five million, seven hundred fifteen thousand, seven hundred ninety-one".