25263391 has 2 divisors, whose sum is σ = 25263392. Its totient is φ = 25263390.

The previous prime is 25263373. The next prime is 25263431. The reversal of 25263391 is 19336252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25263391 - 2¹⁷ = 25132319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25263191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12631695 + 12631696.

It is an arithmetic number, because the mean of its divisors is an integer number (12631696).

Almost surely, 2^25263391 is an apocalyptic number.

25263391 is a deficient number, since it is larger than the sum of its proper divisors (1).

25263391 is an equidigital number, since it uses as much as digits as its factorization.

25263391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 31.

The square root of 25263391 is about 5026.2700882464. The cubic root of 25263391 is about 293.4250684445.

The spelling of 25263391 in words is "twenty-five million, two hundred sixty-three thousand, three hundred ninety-one".