112139971 has 4 divisors (see below), whose sum is σ = 112307272. Its totient is φ = 111972672.

The previous prime is 112139969. The next prime is 112139983. The reversal of 112139971 is 179931211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 179931211 = 89 ⋅2021699.

It is a cyclic number.

It is not a de Polignac number, because 112139971 - 2¹ = 112139969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112139921) 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, 82641 + ... + 83986.

It is an arithmetic number, because the mean of its divisors is an integer number (28076818).

Almost surely, 2^112139971 is an apocalyptic number.

112139971 is a deficient number, since it is larger than the sum of its proper divisors (167301).

112139971 is an equidigital number, since it uses as much as digits as its factorization.

112139971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167300.

The product of its digits is 3402, while the sum is 34.

The square root of 112139971 is about 10589.6161875679. The cubic root of 112139971 is about 482.2291728273.

The spelling of 112139971 in words is "one hundred twelve million, one hundred thirty-nine thousand, nine hundred seventy-one".