25634771 has 2 divisors, whose sum is σ = 25634772. Its totient is φ = 25634770.

The previous prime is 25634761. The next prime is 25634773. The reversal of 25634771 is 17743652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25634771 - 2¹⁰ = 25633747 is a prime.

Together with 25634773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25634773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12817385 + 12817386.

It is an arithmetic number, because the mean of its divisors is an integer number (12817386).

Almost surely, 2^25634771 is an apocalyptic number.

25634771 is a deficient number, since it is larger than the sum of its proper divisors (1).

25634771 is an equidigital number, since it uses as much as digits as its factorization.

25634771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 35.

The square root of 25634771 is about 5063.0792014346. The cubic root of 25634771 is about 294.8558943779.

The spelling of 25634771 in words is "twenty-five million, six hundred thirty-four thousand, seven hundred seventy-one".