112912157 has 4 divisors (see below), whose sum is σ = 112940796. Its totient is φ = 112883520.

The previous prime is 112912139. The next prime is 112912169. The reversal of 112912157 is 751219211.

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: 751219211 = 59 ⋅12732529.

It can be written as a sum of positive squares in 2 ways, for example, as 65108761 + 47803396 = 8069^2 + 6914^2 .

It is a cyclic number.

It is not a de Polignac number, because 112912157 - 2¹⁰ = 112911133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112912127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7238 + ... + 16679.

It is an arithmetic number, because the mean of its divisors is an integer number (28235199).

Almost surely, 2^112912157 is an apocalyptic number.

It is an amenable number.

112912157 is a deficient number, since it is larger than the sum of its proper divisors (28639).

112912157 is an equidigital number, since it uses as much as digits as its factorization.

112912157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28638.

The product of its digits is 1260, while the sum is 29.

The square root of 112912157 is about 10626.0132222767. The cubic root of 112912157 is about 483.3335045052. Note that the first 3 decimals are identical.

The spelling of 112912157 in words is "one hundred twelve million, nine hundred twelve thousand, one hundred fifty-seven".