1321369 has 4 divisors (see below), whose sum is σ = 1510144. Its totient is φ = 1132596.

The previous prime is 1321363. The next prime is 1321379. The reversal of 1321369 is 9631231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9631231 = 17 ⋅566543.

It is a cyclic number.

It is not a de Polignac number, because 1321369 - 2¹¹ = 1319321 is a prime.

It is a super-2 number, since 2×1321369² = 3492032068322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321363) 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, 94377 + ... + 94390.

It is an arithmetic number, because the mean of its divisors is an integer number (377536).

2^1321369 is an apocalyptic number.

It is an amenable number.

1321369 is a deficient number, since it is larger than the sum of its proper divisors (188775).

1321369 is an equidigital number, since it uses as much as digits as its factorization.

1321369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188774.

The product of its digits is 972, while the sum is 25.

The square root of 1321369 is about 1149.5081556909. The cubic root of 1321369 is about 109.7340406742.

The spelling of 1321369 in words is "one million, three hundred twenty-one thousand, three hundred sixty-nine".