25159391 has 2 divisors, whose sum is σ = 25159392. Its totient is φ = 25159390.

The previous prime is 25159357. The next prime is 25159411. The reversal of 25159391 is 19395152.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25159391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25179391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12579695 + 12579696.

It is an arithmetic number, because the mean of its divisors is an integer number (12579696).

Almost surely, 2^25159391 is an apocalyptic number.

25159391 is a deficient number, since it is larger than the sum of its proper divisors (1).

25159391 is an equidigital number, since it uses as much as digits as its factorization.

25159391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12150, while the sum is 35.

The square root of 25159391 is about 5015.9137751760. The cubic root of 25159391 is about 293.0218739858.

The spelling of 25159391 in words is "twenty-five million, one hundred fifty-nine thousand, three hundred ninety-one".