112128239 has 8 divisors (see below), whose sum is σ = 116512560. Its totient is φ = 107778496.

The previous prime is 112128223. The next prime is 112128259. The reversal of 112128239 is 932821211.

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

It is a cyclic number.

It is not a de Polignac number, because 112128239 - 2⁴ = 112128223 is a prime.

It is a super-2 number, since 2×112128239² = 25145483962482242, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112128259) 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, 1934 + ... + 15099.

It is an arithmetic number, because the mean of its divisors is an integer number (14564070).

Almost surely, 2^112128239 is an apocalyptic number.

112128239 is a deficient number, since it is larger than the sum of its proper divisors (4384321).

112128239 is a wasteful number, since it uses less digits than its factorization.

112128239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17289.

The product of its digits is 1728, while the sum is 29.

The square root of 112128239 is about 10589.0622342113. The cubic root of 112128239 is about 482.2123554222.

The spelling of 112128239 in words is "one hundred twelve million, one hundred twenty-eight thousand, two hundred thirty-nine".