25572257 has 2 divisors, whose sum is σ = 25572258. Its totient is φ = 25572256.

The previous prime is 25572227. The next prime is 25572259. The reversal of 25572257 is 75227552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25441936 + 130321 = 5044^2 + 361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25572257 is a prime.

Together with 25572259, 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 (25572259) 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, 12786128 + 12786129.

It is an arithmetic number, because the mean of its divisors is an integer number (12786129).

Almost surely, 2^25572257 is an apocalyptic number.

It is an amenable number.

25572257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25572257 is an equidigital number, since it uses as much as digits as its factorization.

25572257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 49000, while the sum is 35.

The square root of 25572257 is about 5056.9019171821. The cubic root of 25572257 is about 294.6160167363.

The spelling of 25572257 in words is "twenty-five million, five hundred seventy-two thousand, two hundred fifty-seven".