1138139 has 4 divisors (see below), whose sum is σ = 1142640. Its totient is φ = 1133640.

The previous prime is 1138127. The next prime is 1138141. The reversal of 1138139 is 9318311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9318311 = 149 ⋅62539.

It is a cyclic number.

It is not a de Polignac number, because 1138139 - 2⁸ = 1137883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138639) 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 3 ways as a sum of consecutive naturals, for example, 1847 + ... + 2384.

It is an arithmetic number, because the mean of its divisors is an integer number (285660).

2^1138139 is an apocalyptic number.

1138139 is a deficient number, since it is larger than the sum of its proper divisors (4501).

1138139 is an equidigital number, since it uses as much as digits as its factorization.

1138139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4500.

The product of its digits is 648, while the sum is 26.

The square root of 1138139 is about 1066.8359761463. The cubic root of 1138139 is about 104.4075172090.

The spelling of 1138139 in words is "one million, one hundred thirty-eight thousand, one hundred thirty-nine".