25503257 has 12 divisors (see below), whose sum is σ = 28145124. Its totient is φ = 22972320.

The previous prime is 25503241. The next prime is 25503259. The reversal of 25503257 is 75230552.

It can be written as a sum of positive squares in 2 ways, for example, as 9853321 + 15649936 = 3139^2 + 3956^2 .

It is not a de Polignac number, because 25503257 - 2⁴ = 25503241 is a prime.

It is a super-2 number, since 2×25503257² = 1300832235216098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25503259) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23507 + ... + 24567.

It is an arithmetic number, because the mean of its divisors is an integer number (2345427).

Almost surely, 2^25503257 is an apocalyptic number.

It is an amenable number.

25503257 is a deficient number, since it is larger than the sum of its proper divisors (2641867).

25503257 is a wasteful number, since it uses less digits than its factorization.

25503257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160 (or 1117 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 25503257 is about 5050.0749499389. The cubic root of 25503257 is about 294.3507968104.

The spelling of 25503257 in words is "twenty-five million, five hundred three thousand, two hundred fifty-seven".