25707513 has 16 divisors (see below), whose sum is σ = 38857280. Its totient is φ = 14986944.

The previous prime is 25707511. The next prime is 25707529. The reversal of 25707513 is 31570752.

It is not a de Polignac number, because 25707513 - 2¹ = 25707511 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25707511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16606 + ... + 18087.

It is an arithmetic number, because the mean of its divisors is an integer number (2428580).

Almost surely, 2^25707513 is an apocalyptic number.

It is an amenable number.

25707513 is a deficient number, since it is larger than the sum of its proper divisors (13149767).

25707513 is a wasteful number, since it uses less digits than its factorization.

25707513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34728.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 25707513 is about 5070.2576857592. The cubic root of 25707513 is about 295.1345283193.

The spelling of 25707513 in words is "twenty-five million, seven hundred seven thousand, five hundred thirteen".