1321383 has 24 divisors (see below), whose sum is σ = 2093040. Its totient is φ = 739200.

The previous prime is 1321379. The next prime is 1321391. The reversal of 1321383 is 3831231.

It is a happy number.

It is not a de Polignac number, because 1321383 - 2² = 1321379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321303) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13033 + ... + 13133.

It is an arithmetic number, because the mean of its divisors is an integer number (87210).

2^1321383 is an apocalyptic number.

1321383 is a deficient number, since it is larger than the sum of its proper divisors (771657).

1321383 is a wasteful number, since it uses less digits than its factorization.

1321383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207 (or 200 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 1321383 is about 1149.5142452358. The cubic root of 1321383 is about 109.7344282195.

The spelling of 1321383 in words is "one million, three hundred twenty-one thousand, three hundred eighty-three".