6321312 has 72 divisors (see below), whose sum is σ = 18398016. Its totient is φ = 2057856.

The previous prime is 6321307. The next prime is 6321323. The reversal of 6321312 is 2131236.

6321312 is a `hidden beast` number, since 632 + 1 + 31 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13303 + ... + 13769.

It is an arithmetic number, because the mean of its divisors is an integer number (255528).

Almost surely, 2^6321312 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 6321312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9199008).

6321312 is an abundant number, since it is smaller than the sum of its proper divisors (12076704).

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

6321312 is a wasteful number, since it uses less digits than its factorization.

6321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 519 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 6321312 is about 2514.2219472433. The cubic root of 6321312 is about 184.8995022706.

Adding to 6321312 its reverse (2131236), we get a palindrome (8452548).

The spelling of 6321312 in words is "six million, three hundred twenty-one thousand, three hundred twelve".