25245540 has 48 divisors (see below), whose sum is σ = 78543360. Its totient is φ = 6732000.

The previous prime is 25245523. The next prime is 25245551. The reversal of 25245540 is 4554252.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22836 + ... + 23915.

It is an arithmetic number, because the mean of its divisors is an integer number (1636320).

Almost surely, 2^25245540 is an apocalyptic number.

25245540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25245540 is an abundant number, since it is smaller than the sum of its proper divisors (53297820).

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

25245540 is a wasteful number, since it uses less digits than its factorization.

25245540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46769 (or 46761 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 25245540 is about 5024.4940043750. The cubic root of 25245540 is about 293.3559412098.

Adding to 25245540 its reverse (4554252), we get a palindrome (29799792).

The spelling of 25245540 in words is "twenty-five million, two hundred forty-five thousand, five hundred forty".