12987756 has 48 divisors (see below), whose sum is σ = 34322400. Its totient is φ = 4245696.

The previous prime is 12987713. The next prime is 12987761. The reversal of 12987756 is 65778921.

12987756 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4590 + ... + 6858.

It is an arithmetic number, because the mean of its divisors is an integer number (715050).

Almost surely, 2^12987756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12987756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17161200).

12987756 is an abundant number, since it is smaller than the sum of its proper divisors (21334644).

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

12987756 is a wasteful number, since it uses less digits than its factorization.

12987756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335 (or 2327 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 12987756 is about 3603.8529381760. The cubic root of 12987756 is about 235.0596257332.

The spelling of 12987756 in words is "twelve million, nine hundred eighty-seven thousand, seven hundred fifty-six".