12312756 has 48 divisors (see below), whose sum is σ = 32155200. Its totient is φ = 4074336.

The previous prime is 12312737. The next prime is 12312763. The reversal of 12312756 is 65721321.

It is a happy number.

It is a super-3 number, since 3×12312756³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 15.

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 15 ways as a sum of consecutive naturals, for example, 18355 + ... + 19013.

It is an arithmetic number, because the mean of its divisors is an integer number (669900).

Almost surely, 2^12312756 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 12312756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16077600).

12312756 is an abundant number, since it is smaller than the sum of its proper divisors (19842444).

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

12312756 is a wasteful number, since it uses less digits than its factorization.

12312756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 845 (or 837 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12312756 is about 3508.9536902045. The cubic root of 12312756 is about 230.9147940093.

The spelling of 12312756 in words is "twelve million, three hundred twelve thousand, seven hundred fifty-six".