25647245 has 24 divisors (see below), whose sum is σ = 35012376. Its totient is φ = 17926272.

The previous prime is 25647229. The next prime is 25647287. The reversal of 25647245 is 54274652.

It can be written as a sum of positive squares in 4 ways, for example, as 5026564 + 20620681 = 2242^2 + 4541^2 .

It is not a de Polignac number, because 25647245 - 2⁴ = 25647229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22919 + ... + 24011.

It is an arithmetic number, because the mean of its divisors is an integer number (1458849).

Almost surely, 2^25647245 is an apocalyptic number.

It is an amenable number.

25647245 is a deficient number, since it is larger than the sum of its proper divisors (9365131).

25647245 is a wasteful number, since it uses less digits than its factorization.

25647245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149 (or 1130 counting only the distinct ones).

The product of its digits is 67200, while the sum is 35.

The square root of 25647245 is about 5064.3109106768. The cubic root of 25647245 is about 294.9037127103.

The spelling of 25647245 in words is "twenty-five million, six hundred forty-seven thousand, two hundred forty-five".