1331131 has 4 divisors (see below), whose sum is σ = 1344952. Its totient is φ = 1317312.

The previous prime is 1331123. The next prime is 1331153. The reversal of 1331131 is 1311331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1331131 - 2³ = 1331123 is a prime.

It is a super-2 number, since 2×1331131² = 3543819478322, which contains 22 as substring.

It is a Duffinian number.

1331131 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1331431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6765 + ... + 6958.

It is an arithmetic number, because the mean of its divisors is an integer number (336238).

2^1331131 is an apocalyptic number.

1331131 is a deficient number, since it is larger than the sum of its proper divisors (13821).

1331131 is an equidigital number, since it uses as much as digits as its factorization.

1331131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13820.

The product of its digits is 27, while the sum is 13.

The square root of 1331131 is about 1153.7465059535. The cubic root of 1331131 is about 110.0036086970.

Adding to 1331131 its reverse (1311331), we get a palindrome (2642462).

The spelling of 1331131 in words is "one million, three hundred thirty-one thousand, one hundred thirty-one".