1042139 has 8 divisors (see below), whose sum is σ = 1213920. Its totient is φ = 876408.

The previous prime is 1042133. The next prime is 1042141. The reversal of 1042139 is 9312401.

It is not a de Polignac number, because 1042139 - 2⁴ = 1042123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1042139.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19637 + ... + 19689.

It is an arithmetic number, because the mean of its divisors is an integer number (151740).

2^1042139 is an apocalyptic number.

1042139 is a deficient number, since it is larger than the sum of its proper divisors (171781).

1042139 is an frugal number, since it uses more digits than its factorization.

1042139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1042139 is about 1020.8520950657. The cubic root of 1042139 is about 101.3853526869.

The spelling of 1042139 in words is "one million, forty-two thousand, one hundred thirty-nine".