25244257 has 2 divisors, whose sum is σ = 25244258. Its totient is φ = 25244256.

The previous prime is 25244237. The next prime is 25244281. The reversal of 25244257 is 75244252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25010001 + 234256 = 5001^2 + 484^2 .

It is a cyclic number.

It is not a de Polignac number, because 25244257 - 2⁷ = 25244129 is a prime.

It is a super-2 number, since 2×25244257² = 1274545022964098, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25244237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12622128 + 12622129.

It is an arithmetic number, because the mean of its divisors is an integer number (12622129).

Almost surely, 2^25244257 is an apocalyptic number.

It is an amenable number.

25244257 is a deficient number, since it is larger than the sum of its proper divisors (1).

25244257 is an equidigital number, since it uses as much as digits as its factorization.

25244257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 31.

The square root of 25244257 is about 5024.3663282050. The cubic root of 25244257 is about 293.3509715920.

The spelling of 25244257 in words is "twenty-five million, two hundred forty-four thousand, two hundred fifty-seven".