25255764 has 18 divisors (see below), whose sum is σ = 63841050. Its totient is φ = 8418576.

The previous prime is 25255733. The next prime is 25255777. The reversal of 25255764 is 46755252.

It can be written as a sum of positive squares in only one way, i.e., 16892100 + 8363664 = 4110^2 + 2892^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 701549 = 25255764 / (2 + 5 + 2 + 5 + 5 + 7 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 350739 + ... + 350810.

It is an arithmetic number, because the mean of its divisors is an integer number (3546725).

Almost surely, 2^25255764 is an apocalyptic number.

It is an amenable number.

25255764 is an abundant number, since it is smaller than the sum of its proper divisors (38585286).

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

25255764 is a wasteful number, since it uses less digits than its factorization.

25255764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701559 (or 701554 counting only the distinct ones).

The product of its digits is 84000, while the sum is 36.

The square root of 25255764 is about 5025.5113172691. The cubic root of 25255764 is about 293.3955371985.

The spelling of 25255764 in words is "twenty-five million, two hundred fifty-five thousand, seven hundred sixty-four".