12540056 has 16 divisors (see below), whose sum is σ = 23551440. Its totient is φ = 6259680.

The previous prime is 12540049. The next prime is 12540109. The reversal of 12540056 is 65004521.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6926 + ... + 8546.

It is an arithmetic number, because the mean of its divisors is an integer number (1471965).

Almost surely, 2^12540056 is an apocalyptic number.

It is an amenable number.

12540056 is a deficient number, since it is larger than the sum of its proper divisors (11011384).

12540056 is a wasteful number, since it uses less digits than its factorization.

12540056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2594 (or 2590 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 12540056 is about 3541.1941488713. The cubic root of 12540056 is about 232.3270753328.

Adding to 12540056 its reverse (65004521), we get a palindrome (77544577).

The spelling of 12540056 in words is "twelve million, five hundred forty thousand, fifty-six".