1139231 has 4 divisors (see below), whose sum is σ = 1158600. Its totient is φ = 1119864.

The previous prime is 1139227. The next prime is 1139239. The reversal of 1139231 is 1329311.

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 1139231 - 2² = 1139227 is a prime.

It is a super-2 number, since 2×1139231² = 2595694542722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139239) 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, 9596 + ... + 9713.

It is an arithmetic number, because the mean of its divisors is an integer number (289650).

2^1139231 is an apocalyptic number.

1139231 is a deficient number, since it is larger than the sum of its proper divisors (19369).

1139231 is an equidigital number, since it uses as much as digits as its factorization.

1139231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19368.

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

The square root of 1139231 is about 1067.3476472078. The cubic root of 1139231 is about 104.4408981828.

The spelling of 1139231 in words is "one million, one hundred thirty-nine thousand, two hundred thirty-one".