1108139 has 4 divisors (see below), whose sum is σ = 1120680. Its totient is φ = 1095600.

The previous prime is 1108127. The next prime is 1108147. The reversal of 1108139 is 9318011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9318011 = 31 ⋅300581.

It is a cyclic number.

It is not a de Polignac number, because 1108139 - 2⁴ = 1108123 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1108169) 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, 6137 + ... + 6314.

It is an arithmetic number, because the mean of its divisors is an integer number (280170).

2^1108139 is an apocalyptic number.

1108139 is a deficient number, since it is larger than the sum of its proper divisors (12541).

1108139 is an equidigital number, since it uses as much as digits as its factorization.

1108139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12540.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 1108139 is about 1052.6818132750. The cubic root of 1108139 is about 103.4819839973.

The spelling of 1108139 in words is "one million, one hundred eight thousand, one hundred thirty-nine".