25240657 has 12 divisors (see below), whose sum is σ = 27491724. Its totient is φ = 23162880.

The previous prime is 25240639. The next prime is 25240681. The reversal of 25240657 is 75604252.

It can be written as a sum of positive squares in 6 ways, for example, as 2430481 + 22810176 = 1559^2 + 4776^2 .

It is not a de Polignac number, because 25240657 - 2¹⁹ = 24716369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25240627) 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, 39057 + ... + 39697.

It is an arithmetic number, because the mean of its divisors is an integer number (2290977).

Almost surely, 2^25240657 is an apocalyptic number.

It is an amenable number.

25240657 is a deficient number, since it is larger than the sum of its proper divisors (2251067).

25240657 is a wasteful number, since it uses less digits than its factorization.

25240657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 887 counting only the distinct ones).

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 25240657 is about 5024.0080612993. The cubic root of 25240657 is about 293.3370263252.

The spelling of 25240657 in words is "twenty-five million, two hundred forty thousand, six hundred fifty-seven".