1321212 has 24 divisors (see below), whose sum is σ = 3217536. Its totient is φ = 421168.

The previous prime is 1321193. The next prime is 1321213. The reversal of 1321212 is 2121231.

It is a super-2 number, since 2×1321212² = 3491202297888, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

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

1321212 is a modest number, since divided by 1212 gives 132 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2118 + ... + 2669.

It is an arithmetic number, because the mean of its divisors is an integer number (134064).

2^1321212 is an apocalyptic number.

1321212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1321212 is an abundant number, since it is smaller than the sum of its proper divisors (1896324).

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

1321212 is a wasteful number, since it uses less digits than its factorization.

1321212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4817 (or 4815 counting only the distinct ones).

The product of its digits is 24, while the sum is 12.

The square root of 1321212 is about 1149.4398635857. The cubic root of 1321212 is about 109.7296944427.

Adding to 1321212 its reverse (2121231), we get a palindrome (3442443).

The spelling of 1321212 in words is "one million, three hundred twenty-one thousand, two hundred twelve".