25388765 has 4 divisors (see below), whose sum is σ = 30466524. Its totient is φ = 20311008.

The previous prime is 25388761. The next prime is 25388777. The reversal of 25388765 is 56788352.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13410244 + 11978521 = 3662^2 + 3461^2 .

It is a cyclic number.

It is not a de Polignac number, because 25388765 - 2² = 25388761 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25388761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2538872 + ... + 2538881.

It is an arithmetic number, because the mean of its divisors is an integer number (7616631).

Almost surely, 2^25388765 is an apocalyptic number.

It is an amenable number.

25388765 is a deficient number, since it is larger than the sum of its proper divisors (5077759).

25388765 is an equidigital number, since it uses as much as digits as its factorization.

25388765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5077758.

The product of its digits is 403200, while the sum is 44.

The square root of 25388765 is about 5038.7265256213. The cubic root of 25388765 is about 293.9096587929.

The spelling of 25388765 in words is "twenty-five million, three hundred eighty-eight thousand, seven hundred sixty-five".