25280172 has 72 divisors (see below), whose sum is σ = 66533376. Its totient is φ = 8087904.

The previous prime is 25280153. The next prime is 25280179. The reversal of 25280172 is 27108252.

It is not an unprimeable number, because it can be changed into a prime (25280179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 113253 + ... + 113475.

Almost surely, 2^25280172 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 25280172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33266688).

25280172 is an abundant number, since it is smaller than the sum of its proper divisors (41253204).

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

25280172 is a wasteful number, since it uses less digits than its factorization.

25280172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 25280172 is about 5027.9391404431. The cubic root of 25280172 is about 293.4900224622.

It can be divided in two parts, 25280 and 172, that added together give a palindrome (25452).

The spelling of 25280172 in words is "twenty-five million, two hundred eighty thousand, one hundred seventy-two".