25581120 has 56 divisors (see below), whose sum is σ = 81223104. Its totient is φ = 6821376.

The previous prime is 25581119. The next prime is 25581133. The reversal of 25581120 is 2118552.

It is a Harshad number since it is a multiple of its sum of digits (24).

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, 12364 + ... + 14283.

Almost surely, 2^25581120 is an apocalyptic number.

25581120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25581120 is an abundant number, since it is smaller than the sum of its proper divisors (55641984).

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

25581120 is a wasteful number, since it uses less digits than its factorization.

25581120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26667 (or 26657 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 25581120 is about 5057.7781683265. The cubic root of 25581120 is about 294.6500494532.

Adding to 25581120 its reverse (2118552), we get a palindrome (27699672).

The spelling of 25581120 in words is "twenty-five million, five hundred eighty-one thousand, one hundred twenty".