1321131 has 16 divisors (see below), whose sum is σ = 2052864. Its totient is φ = 740064.

The previous prime is 1321109. The next prime is 1321139. The reversal of 1321131 is 1311231.

It is not a de Polignac number, because 1321131 - 2¹⁰ = 1320107 is a prime.

It is a super-2 number, since 2×1321131² = 3490774238322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1321139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 520 + ... + 1706.

It is an arithmetic number, because the mean of its divisors is an integer number (128304).

2^1321131 is an apocalyptic number.

1321131 is a deficient number, since it is larger than the sum of its proper divisors (731733).

1321131 is a wasteful number, since it uses less digits than its factorization.

1321131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250.

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

The square root of 1321131 is about 1149.4046284925. The cubic root of 1321131 is about 109.7274519848.

Adding to 1321131 its reverse (1311231), we get a palindrome (2632362).

The spelling of 1321131 in words is "one million, three hundred twenty-one thousand, one hundred thirty-one".