25816725 has 120 divisors (see below), whose sum is σ = 55814880. Its totient is φ = 11664000.

The previous prime is 25816723. The next prime is 25816729. The reversal of 25816725 is 52761852.

It is a happy number.

25816725 is a `hidden beast` number, since 2 + 581 + 6 + 72 + 5 = 666.

It is not a de Polignac number, because 25816725 - 2¹ = 25816723 is a prime.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 25816725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25816723) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 423195 + ... + 423255.

It is an arithmetic number, because the mean of its divisors is an integer number (465124).

Almost surely, 2^25816725 is an apocalyptic number.

25816725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25816725 is an abundant number, since it is smaller than the sum of its proper divisors (29998155).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25816725 is a wasteful number, since it uses less digits than its factorization.

25816725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113 (or 99 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 25816725 is about 5081.0161385298. The cubic root of 25816725 is about 295.5518731888.

The spelling of 25816725 in words is "twenty-five million, eight hundred sixteen thousand, seven hundred twenty-five".