1239131 has 4 divisors (see below), whose sum is σ = 1267992. Its totient is φ = 1210272.

The previous prime is 1239127. The next prime is 1239151. The reversal of 1239131 is 1319321.

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 1239131 - 2² = 1239127 is a prime.

It is a super-2 number, since 2×1239131² = 3070891270322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1239151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14366 + ... + 14451.

It is an arithmetic number, because the mean of its divisors is an integer number (316998).

2^1239131 is an apocalyptic number.

1239131 is a deficient number, since it is larger than the sum of its proper divisors (28861).

1239131 is an equidigital number, since it uses as much as digits as its factorization.

1239131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28860.

The product of its digits is 162, while the sum is 20.

The square root of 1239131 is about 1113.1626116610. The cubic root of 1239131 is about 107.4086044889.

The spelling of 1239131 in words is "one million, two hundred thirty-nine thousand, one hundred thirty-one".