25458725 has 18 divisors (see below), whose sum is σ = 32324754. Its totient is φ = 19890400.

The previous prime is 25458721. The next prime is 25458733. The reversal of 25458725 is 52785452.

It can be written as a sum of positive squares in 3 ways, for example, as 638401 + 24820324 = 799^2 + 4982^2 .

It is not a de Polignac number, because 25458725 - 2² = 25458721 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25458721) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 54995 + ... + 55455.

Almost surely, 2^25458725 is an apocalyptic number.

25458725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25458725 is a deficient number, since it is larger than the sum of its proper divisors (6866029).

25458725 is an equidigital number, since it uses as much as digits as its factorization.

25458725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565 (or 513 counting only the distinct ones).

The product of its digits is 112000, while the sum is 38.

The square root of 25458725 is about 5045.6639800922. The cubic root of 25458725 is about 294.1793720844.

The spelling of 25458725 in words is "twenty-five million, four hundred fifty-eight thousand, seven hundred twenty-five".