1147139 has 12 divisors (see below), whose sum is σ = 1369368. Its totient is φ = 957600.

The previous prime is 1147127. The next prime is 1147141. The reversal of 1147139 is 9317411.

It is not a de Polignac number, because 1147139 - 2²⁰ = 98563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1147169) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1724 + ... + 2294.

It is an arithmetic number, because the mean of its divisors is an integer number (114114).

2^1147139 is an apocalyptic number.

1147139 is a deficient number, since it is larger than the sum of its proper divisors (222229).

1147139 is an equidigital number, since it uses as much as digits as its factorization.

1147139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 619 counting only the distinct ones).

The product of its digits is 756, while the sum is 26.

The square root of 1147139 is about 1071.0457506568. The cubic root of 1147139 is about 104.6820008547.

The spelling of 1147139 in words is "one million, one hundred forty-seven thousand, one hundred thirty-nine".