12525140 has 24 divisors (see below), whose sum is σ = 26370792. Its totient is φ = 4997120.

The previous prime is 12525137. The next prime is 12525157. The reversal of 12525140 is 4152521.

It can be written as a sum of positive squares in 4 ways, for example, as 6697744 + 5827396 = 2588^2 + 2414^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

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, 12332 + ... + 13308.

It is an arithmetic number, because the mean of its divisors is an integer number (1098783).

Almost surely, 2^12525140 is an apocalyptic number.

12525140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12525140 is an abundant number, since it is smaller than the sum of its proper divisors (13845652).

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

12525140 is a wasteful number, since it uses less digits than its factorization.

12525140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1627 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 12525140 is about 3539.0874530025. The cubic root of 12525140 is about 232.2349235498.

Adding to 12525140 its reverse (4152521), we get a palindrome (16677661).

The spelling of 12525140 in words is "twelve million, five hundred twenty-five thousand, one hundred forty".