25499560 has 16 divisors (see below), whose sum is σ = 57374100. Its totient is φ = 10199808.

The previous prime is 25499533. The next prime is 25499567. The reversal of 25499560 is 6599452.

It can be written as a sum of positive squares in 2 ways, for example, as 25341156 + 158404 = 5034^2 + 398^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 637489 = 25499560 / (2 + 5 + 4 + 9 + 9 + 5 + 6 + 0).

It is not an unprimeable number, because it can be changed into a prime (25499567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318705 + ... + 318784.

Almost surely, 2^25499560 is an apocalyptic number.

25499560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25499560 is an abundant number, since it is smaller than the sum of its proper divisors (31874540).

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

25499560 is a wasteful number, since it uses less digits than its factorization.

25499560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637500 (or 637496 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 40.

The square root of 25499560 is about 5049.7089025012. The cubic root of 25499560 is about 294.3365729085.

The spelling of 25499560 in words is "twenty-five million, four hundred ninety-nine thousand, five hundred sixty".