1439139 has 8 divisors (see below), whose sum is σ = 2066512. Its totient is φ = 885600.

The previous prime is 1439129. The next prime is 1439147. The reversal of 1439139 is 9319341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1439139 - 2⁵ = 1439107 is a prime.

It is a super-2 number, since 2×1439139² = 4142242122642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1439129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18412 + ... + 18489.

It is an arithmetic number, because the mean of its divisors is an integer number (258314).

2^1439139 is an apocalyptic number.

1439139 is a deficient number, since it is larger than the sum of its proper divisors (627373).

1439139 is a wasteful number, since it uses less digits than its factorization.

1439139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36917.

The product of its digits is 2916, while the sum is 30.

The square root of 1439139 is about 1199.6411963583. The cubic root of 1439139 is about 112.9018125335.

The spelling of 1439139 in words is "one million, four hundred thirty-nine thousand, one hundred thirty-nine".