12321736 has 72 divisors (see below), whose sum is σ = 29133270. Its totient is φ = 4854528.

The previous prime is 12321733. The next prime is 12321763. The reversal of 12321736 is 63712321.

It can be written as a sum of positive squares in only one way, i.e., 9060100 + 3261636 = 3010^2 + 1806^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12321736.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12321733) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 286531 + ... + 286573.

Almost surely, 2^12321736 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 12321736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14566635).

12321736 is an abundant number, since it is smaller than the sum of its proper divisors (16811534).

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

12321736 is a wasteful number, since it uses less digits than its factorization.

12321736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123 (or 69 counting only the distinct ones).

The product of its digits is 1512, while the sum is 25.

The square root of 12321736 is about 3510.2330406969. The cubic root of 12321736 is about 230.9709176733.

The spelling of 12321736 in words is "twelve million, three hundred twenty-one thousand, seven hundred thirty-six".