25161280 has 56 divisors (see below), whose sum is σ = 60944760. Its totient is φ = 9891840.

The previous prime is 25161251. The next prime is 25161307. The reversal of 25161280 is 8216152.

It can be written as a sum of positive squares in 4 ways, for example, as 876096 + 24285184 = 936^2 + 4928^2 .

It is a super-2 number, since 2×25161280² = 1266180022476800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18876 + ... + 20164.

Almost surely, 2^25161280 is an apocalyptic number.

25161280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25161280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30472380).

25161280 is an abundant number, since it is smaller than the sum of its proper divisors (35783480).

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

25161280 is a wasteful number, since it uses less digits than its factorization.

25161280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 25161280 is about 5016.1020723267. The cubic root of 25161280 is about 293.0292072908.

The spelling of 25161280 in words is "twenty-five million, one hundred sixty-one thousand, two hundred eighty".