1131321 has 8 divisors (see below), whose sum is σ = 1519840. Its totient is φ = 748512.

The previous prime is 1131307. The next prime is 1131323. The reversal of 1131321 is 1231311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131321 - 2⁹ = 1130809 is a prime.

It is a Duffinian number.

It is a Curzon number.

1131321 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1131297 and 1131306.

It is not an unprimeable number, because it can be changed into a prime (1131323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 940 + ... + 1773.

It is an arithmetic number, because the mean of its divisors is an integer number (189980).

2^1131321 is an apocalyptic number.

It is an amenable number.

1131321 is a deficient number, since it is larger than the sum of its proper divisors (388519).

1131321 is a wasteful number, since it uses less digits than its factorization.

1131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2855.

The product of its digits is 18, while the sum is 12.

The square root of 1131321 is about 1063.6357459206. The cubic root of 1131321 is about 104.1986157643.

Adding to 1131321 its reverse (1231311), we get a palindrome (2362632).

The spelling of 1131321 in words is "one million, one hundred thirty-one thousand, three hundred twenty-one".