12387056 has 20 divisors (see below), whose sum is σ = 26182104. Its totient is φ = 5630400.

The previous prime is 12387029. The next prime is 12387059. The reversal of 12387056 is 65078321.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12387059) 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, 35015 + ... + 35366.

Almost surely, 2^12387056 is an apocalyptic number.

12387056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12387056 is an abundant number, since it is smaller than the sum of its proper divisors (13795048).

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

12387056 is a wasteful number, since it uses less digits than its factorization.

12387056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70400 (or 70394 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 12387056 is about 3519.5249679467. The cubic root of 12387056 is about 231.3783396688.

The spelling of 12387056 in words is "twelve million, three hundred eighty-seven thousand, fifty-six".