112161987 has 12 divisors (see below), whose sum is σ = 185156400. Its totient is φ = 64092528.

The previous prime is 112161943. The next prime is 112161989. The reversal of 112161987 is 789161211.

112161987 is a `hidden beast` number, since 11 + 21 + 619 + 8 + 7 = 666.

It is not a de Polignac number, because 112161987 - 2¹⁰ = 112160963 is a prime.

It is a super-2 number, since 2×112161987² = 25160622655576338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (112161989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 890112 + ... + 890237.

It is an arithmetic number, because the mean of its divisors is an integer number (15429700).

Almost surely, 2^112161987 is an apocalyptic number.

112161987 is a deficient number, since it is larger than the sum of its proper divisors (72994413).

112161987 is a wasteful number, since it uses less digits than its factorization.

112161987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780362 (or 1780359 counting only the distinct ones).

The product of its digits is 6048, while the sum is 36.

The square root of 112161987 is about 10590.6556454263. The cubic root of 112161987 is about 482.2607288154.

It can be divided in two parts, 11216 and 1987, that added together give a triangular number (13203 = T₁₆₂).

The spelling of 112161987 in words is "one hundred twelve million, one hundred sixty-one thousand, nine hundred eighty-seven".