321812 has 12 divisors (see below), whose sum is σ = 576576. Its totient is φ = 157080.

The previous prime is 321799. The next prime is 321817. The reversal of 321812 is 218123.

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

It is a nialpdrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321812.

It is not an unprimeable number, because it can be changed into a prime (321817) 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, 764 + ... + 1107.

It is an arithmetic number, because the mean of its divisors is an integer number (48048).

2³²¹⁸¹² is an apocalyptic number.

It is an amenable number.

321812 is a deficient number, since it is larger than the sum of its proper divisors (254764).

321812 is a wasteful number, since it uses less digits than its factorization.

321812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1916 counting only the distinct ones).

The product of its digits is 96, while the sum is 17.

The square root of 321812 is about 567.2847609446. The cubic root of 321812 is about 68.5278981325.

Adding to 321812 its reverse (218123), we get a palindrome (539935).

The spelling of 321812 in words is "three hundred twenty-one thousand, eight hundred twelve".