1331231 has 4 divisors (see below), whose sum is σ = 1452264. Its totient is φ = 1210200.

The previous prime is 1331227. The next prime is 1331243. The reversal of 1331231 is 1321331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321331 = 11 ⋅120121.

It is a cyclic number.

It is not a de Polignac number, because 1331231 - 2² = 1331227 is a prime.

It is a super-2 number, since 2×1331231² = 3544351950722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331251) 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, 60500 + ... + 60521.

It is an arithmetic number, because the mean of its divisors is an integer number (363066).

2^1331231 is an apocalyptic number.

1331231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1331231 is a deficient number, since it is larger than the sum of its proper divisors (121033).

1331231 is a wasteful number, since it uses less digits than its factorization.

1331231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121032.

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

The square root of 1331231 is about 1153.7898422156. The cubic root of 1331231 is about 110.0063632683.

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

The spelling of 1331231 in words is "one million, three hundred thirty-one thousand, two hundred thirty-one".