25457771 has 2 divisors, whose sum is σ = 25457772. Its totient is φ = 25457770.

The previous prime is 25457753. The next prime is 25457779. The reversal of 25457771 is 17775452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25457771 is a prime.

It is not a weakly prime, because it can be changed into another prime (25457779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12728885 + 12728886.

It is an arithmetic number, because the mean of its divisors is an integer number (12728886).

Almost surely, 2^25457771 is an apocalyptic number.

25457771 is a deficient number, since it is larger than the sum of its proper divisors (1).

25457771 is an equidigital number, since it uses as much as digits as its factorization.

25457771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68600, while the sum is 38.

The square root of 25457771 is about 5045.5694425902. The cubic root of 25457771 is about 294.1756975010.

The spelling of 25457771 in words is "twenty-five million, four hundred fifty-seven thousand, seven hundred seventy-one".