111139 has 4 divisors (see below), whose sum is σ = 127024.
Its totient is φ = 95256.
The previous prime is 111127. The next prime is 111143. The reversal of 111139 is 931111.
It is a happy number.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931111 = 257 ⋅3623.
It is a de Polignac number, because none of the positive numbers 2k-111139 is a prime.
It is a Duffinian number.
It is a plaindrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (111109) 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, 7932 + ... + 7945.
It is an arithmetic number, because the mean of its divisors is an integer number (31756).
2111139 is an apocalyptic number.
111139 is a deficient number, since it is larger than the sum of its proper divisors (15885).
111139 is an equidigital number, since it uses as much as digits as its factorization.
111139 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 15884.
The product of its digits is 27, while the sum is 16.
The square root of 111139 is about 333.3751640420.
The cubic root of 111139 is about 48.0790076142.
The spelling of 111139 in words is "one hundred eleven thousand, one hundred thirty-nine".