12031956 has 48 divisors (see below), whose sum is σ = 32047680. Its totient is φ = 3900960.

The previous prime is 12031949. The next prime is 12031961. The reversal of 12031956 is 65913021.

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

It is a congruent number.

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, 2491 + ... + 5501.

It is an arithmetic number, because the mean of its divisors is an integer number (667660).

Almost surely, 2^12031956 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 12031956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16023840).

12031956 is an abundant number, since it is smaller than the sum of its proper divisors (20015724).

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

12031956 is a wasteful number, since it uses less digits than its factorization.

12031956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3061 (or 3053 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 12031956 is about 3468.7109997808. The cubic root of 12031956 is about 229.1458933163.

Adding to 12031956 its reverse (65913021), we get a palindrome (77944977).

The spelling of 12031956 in words is "twelve million, thirty-one thousand, nine hundred fifty-six".