12725540 has 12 divisors (see below), whose sum is σ = 26723676. Its totient is φ = 5090208.

The previous prime is 12725513. The next prime is 12725551. The reversal of 12725540 is 4552721.

It can be written as a sum of positive squares in 2 ways, for example, as 3189796 + 9535744 = 1786^2 + 3088^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318119 + ... + 318158.

It is an arithmetic number, because the mean of its divisors is an integer number (2226973).

Almost surely, 2^12725540 is an apocalyptic number.

12725540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12725540 is an abundant number, since it is smaller than the sum of its proper divisors (13998136).

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

12725540 is a wasteful number, since it uses less digits than its factorization.

12725540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636286 (or 636284 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 12725540 is about 3567.2874849106. The cubic root of 12725540 is about 233.4669484159.

The spelling of 12725540 in words is "twelve million, seven hundred twenty-five thousand, five hundred forty".