25705725 has 24 divisors (see below), whose sum is σ = 42711552. Its totient is φ = 13641600.

The previous prime is 25705723. The next prime is 25705733. The reversal of 25705725 is 52750752.

It is not a de Polignac number, because 25705725 - 2¹ = 25705723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25705723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16740 + ... + 18210.

It is an arithmetic number, because the mean of its divisors is an integer number (1779648).

Almost surely, 2^25705725 is an apocalyptic number.

25705725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25705725 is a deficient number, since it is larger than the sum of its proper divisors (17005827).

25705725 is a wasteful number, since it uses less digits than its factorization.

25705725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717 (or 1712 counting only the distinct ones).

The product of its (nonzero) digits is 24500, while the sum is 33.

The square root of 25705725 is about 5070.0813602939. The cubic root of 25705725 is about 295.1276857959.

The spelling of 25705725 in words is "twenty-five million, seven hundred five thousand, seven hundred twenty-five".