25445257 has 2 divisors, whose sum is σ = 25445258. Its totient is φ = 25445256.

The previous prime is 25445249. The next prime is 25445269. The reversal of 25445257 is 75254452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14561856 + 10883401 = 3816^2 + 3299^2 .

It is a cyclic number.

It is not a de Polignac number, because 25445257 - 2³ = 25445249 is a prime.

It is a super-2 number, since 2×25445257² = 1294922207592098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25448257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12722628 + 12722629.

It is an arithmetic number, because the mean of its divisors is an integer number (12722629).

Almost surely, 2^25445257 is an apocalyptic number.

It is an amenable number.

25445257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25445257 is an equidigital number, since it uses as much as digits as its factorization.

25445257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56000, while the sum is 34.

The square root of 25445257 is about 5044.3291922713. The cubic root of 25445257 is about 294.1274880166.

The spelling of 25445257 in words is "twenty-five million, four hundred forty-five thousand, two hundred fifty-seven".