25431560 has 128 divisors (see below), whose sum is σ = 74649600. Its totient is φ = 7560960.

The previous prime is 25431517. The next prime is 25431569. The reversal of 25431560 is 6513452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25431569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70661 + ... + 71019.

It is an arithmetic number, because the mean of its divisors is an integer number (583200).

Almost surely, 2^25431560 is an apocalyptic number.

25431560 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 25431560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37324800).

25431560 is an abundant number, since it is smaller than the sum of its proper divisors (49218040).

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

25431560 is a wasteful number, since it uses less digits than its factorization.

25431560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 25431560 is about 5042.9713463394. The cubic root of 25431560 is about 294.0747029693.

The spelling of 25431560 in words is "twenty-five million, four hundred thirty-one thousand, five hundred sixty".