25657451 has 2 divisors, whose sum is σ = 25657452. Its totient is φ = 25657450.

The previous prime is 25657439. The next prime is 25657453. The reversal of 25657451 is 15475652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25657451 - 2²² = 21463147 is a prime.

Together with 25657453, 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 (25657453) 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, 12828725 + 12828726.

It is an arithmetic number, because the mean of its divisors is an integer number (12828726).

Almost surely, 2^25657451 is an apocalyptic number.

25657451 is a deficient number, since it is larger than the sum of its proper divisors (1).

25657451 is an equidigital number, since it uses as much as digits as its factorization.

25657451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 35.

The square root of 25657451 is about 5065.3184500088. The cubic root of 25657451 is about 294.9428252692.

The spelling of 25657451 in words is "twenty-five million, six hundred fifty-seven thousand, four hundred fifty-one".