1321944 has 64 divisors (see below), whose sum is σ = 3763200. Its totient is φ = 383616.

The previous prime is 1321939. The next prime is 1321951. The reversal of 1321944 is 4491231.

It is a Harshad number since it is a multiple of its sum of digits (24).

1321944 is a Rhonda number in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5817 + ... + 6039.

It is an arithmetic number, because the mean of its divisors is an integer number (58800).

2^1321944 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 1321944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1881600).

1321944 is an abundant number, since it is smaller than the sum of its proper divisors (2441256).

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

1321944 is a wasteful number, since it uses less digits than its factorization.

1321944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 260 counting only the distinct ones).

The product of its digits is 864, while the sum is 24.

The square root of 1321944 is about 1149.7582354565. The cubic root of 1321944 is about 109.7499554624.

The spelling of 1321944 in words is "one million, three hundred twenty-one thousand, nine hundred forty-four".