1139023 has 4 divisors (see below), whose sum is σ = 1160568. Its totient is φ = 1117480.

The previous prime is 1139011. The next prime is 1139041. The reversal of 1139023 is 3209311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139023 is a prime.

It is a Duffinian number.

1139023 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139003) 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, 10693 + ... + 10798.

It is an arithmetic number, because the mean of its divisors is an integer number (290142).

2^1139023 is an apocalyptic number.

1139023 is a deficient number, since it is larger than the sum of its proper divisors (21545).

1139023 is an equidigital number, since it uses as much as digits as its factorization.

1139023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21544.

The product of its (nonzero) digits is 162, while the sum is 19.

The square root of 1139023 is about 1067.2502049660. The cubic root of 1139023 is about 104.4345415472.

The spelling of 1139023 in words is "one million, one hundred thirty-nine thousand, twenty-three".