25288785 has 12 divisors (see below), whose sum is σ = 43833972. Its totient is φ = 13487328.

The previous prime is 25288771. The next prime is 25288787. The reversal of 25288785 is 58788252.

It can be written as a sum of positive squares in 2 ways, for example, as 11716929 + 13571856 = 3423^2 + 3684^2 .

It is not a de Polignac number, because 25288785 - 2⁷ = 25288657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 561973 = 25288785 / (2 + 5 + 2 + 8 + 8 + 7 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 25288785.

It is not an unprimeable number, because it can be changed into a prime (25288787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280942 + ... + 281031.

It is an arithmetic number, because the mean of its divisors is an integer number (3652831).

Almost surely, 2^25288785 is an apocalyptic number.

It is an amenable number.

25288785 is a deficient number, since it is larger than the sum of its proper divisors (18545187).

25288785 is a wasteful number, since it uses less digits than its factorization.

25288785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561984 (or 561981 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 25288785 is about 5028.7955814489. The cubic root of 25288785 is about 293.5233495369.

The spelling of 25288785 in words is "twenty-five million, two hundred eighty-eight thousand, seven hundred eighty-five".