25289172 has 60 divisors (see below), whose sum is σ = 66929940. Its totient is φ = 8325504.

The previous prime is 25289153. The next prime is 25289179. The reversal of 25289172 is 27198252.

It can be written as a sum of positive squares in 2 ways, for example, as 13220496 + 12068676 = 3636^2 + 3474^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25289179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 28398 + ... + 29274.

It is an arithmetic number, because the mean of its divisors is an integer number (1115499).

Almost surely, 2^25289172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25289172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33464970).

25289172 is an abundant number, since it is smaller than the sum of its proper divisors (41640768).

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

25289172 is a wasteful number, since it uses less digits than its factorization.

25289172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 971 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 25289172 is about 5028.8340597001. The cubic root of 25289172 is about 293.5248468140.

The spelling of 25289172 in words is "twenty-five million, two hundred eighty-nine thousand, one hundred seventy-two".