25072128 has 60 divisors (see below), whose sum is σ = 72373158. Its totient is φ = 8355840.

The previous prime is 25072123. The next prime is 25072163. The reversal of 25072128 is 82127052.

It can be written as a sum of positive squares in only one way, i.e., 19079424 + 5992704 = 4368^2 + 2448^2 .

It is a super-2 number, since 2×25072128² = 1257223204896768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25072123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1888 + ... + 7328.

Almost surely, 2^25072128 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 25072128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36186579).

25072128 is an abundant number, since it is smaller than the sum of its proper divisors (47301030).

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

25072128 is an equidigital number, since it uses as much as digits as its factorization.

25072128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5465 (or 5446 counting only the distinct ones).

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

The square root of 25072128 is about 5007.2076050430. The cubic root of 25072128 is about 292.6827085527.

It can be divided in two parts, 25072 and 128, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 25072128 in words is "twenty-five million, seventy-two thousand, one hundred twenty-eight".