1221332 has 24 divisors (see below), whose sum is σ = 2491776. Its totient is φ = 512928.

The previous prime is 1221299. The next prime is 1221373. The reversal of 1221332 is 2331221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1073 + ... + 1895.

It is an arithmetic number, because the mean of its divisors is an integer number (103824).

2^1221332 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 1221332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1245888).

1221332 is an abundant number, since it is smaller than the sum of its proper divisors (1270444).

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

1221332 is a wasteful number, since it uses less digits than its factorization.

1221332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887 (or 885 counting only the distinct ones).

The product of its digits is 72, while the sum is 14.

The square root of 1221332 is about 1105.1389052965. The cubic root of 1221332 is about 106.8918463464.

Adding to 1221332 its reverse (2331221), we get a palindrome (3552553).

The spelling of 1221332 in words is "one million, two hundred twenty-one thousand, three hundred thirty-two".