1321331 has 4 divisors (see below), whose sum is σ = 1441464. Its totient is φ = 1201200.

The previous prime is 1321319. The next prime is 1321349. The reversal of 1321331 is 1331231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1331231 = 11 ⋅121021.

It is not a de Polignac number, because 1321331 - 2⁶ = 1321267 is a prime.

It is a super-2 number, since 2×1321331² = 3491831223122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321301) 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, 60050 + ... + 60071.

It is an arithmetic number, because the mean of its divisors is an integer number (360366).

2^1321331 is an apocalyptic number.

1321331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1321331 is a deficient number, since it is larger than the sum of its proper divisors (120133).

1321331 is a wasteful number, since it uses less digits than its factorization.

1321331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120132.

The product of its digits is 54, while the sum is 14.

The square root of 1321331 is about 1149.4916267638. The cubic root of 1321331 is about 109.7329887516.

Adding to 1321331 its reverse (1331231), we get a palindrome (2652562).

The spelling of 1321331 in words is "one million, three hundred twenty-one thousand, three hundred thirty-one".