321612 has 12 divisors (see below), whose sum is σ = 750456. Its totient is φ = 107200.

The previous prime is 321611. The next prime is 321617. The reversal of 321612 is 216123.

It is a tau number, because it is divible by the number of its divisors (12).

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

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 321591 and 321600.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321612.

It is not an unprimeable number, because it can be changed into a prime (321611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13389 + ... + 13412.

It is an arithmetic number, because the mean of its divisors is an integer number (62538).

2³²¹⁶¹² is an apocalyptic number.

It is an amenable number.

321612 is an abundant number, since it is smaller than the sum of its proper divisors (428844).

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

321612 is a wasteful number, since it uses less digits than its factorization.

321612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26808 (or 26806 counting only the distinct ones).

The product of its digits is 72, while the sum is 15.

The square root of 321612 is about 567.1084552359. The cubic root of 321612 is about 68.5136989314.

Adding to 321612 its reverse (216123), we get a palindrome (537735).

The spelling of 321612 in words is "three hundred twenty-one thousand, six hundred twelve".