111520139 has 8 divisors (see below), whose sum is σ = 119315280. Its totient is φ = 103917600.

The previous prime is 111520133. The next prime is 111520147. The reversal of 111520139 is 931025111.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111520139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111520133) 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, 46952 + ... + 49269.

It is an arithmetic number, because the mean of its divisors is an integer number (14914410).

Almost surely, 2^111520139 is an apocalyptic number.

111520139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

111520139 is a deficient number, since it is larger than the sum of its proper divisors (7795141).

111520139 is an equidigital number, since it uses as much as digits as its factorization.

111520139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96301.

The product of its (nonzero) digits is 270, while the sum is 23.

The square root of 111520139 is about 10560.3096072038. The cubic root of 111520139 is about 481.3390546614.

The spelling of 111520139 in words is "one hundred eleven million, five hundred twenty thousand, one hundred thirty-nine".