112587721 has 4 divisors (see below), whose sum is σ = 112727700. Its totient is φ = 112447744.

The previous prime is 112587689. The next prime is 112587731. The reversal of 112587721 is 127785211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 127785211 = 293 ⋅436127.

It can be written as a sum of positive squares in 2 ways, for example, as 74580496 + 38007225 = 8636^2 + 6165^2 .

It is a cyclic number.

It is not a de Polignac number, because 112587721 - 2⁵ = 112587689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (112587731) 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, 68776 + ... + 70393.

It is an arithmetic number, because the mean of its divisors is an integer number (28181925).

Almost surely, 2^112587721 is an apocalyptic number.

It is an amenable number.

112587721 is a deficient number, since it is larger than the sum of its proper divisors (139979).

112587721 is an equidigital number, since it uses as much as digits as its factorization.

112587721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139978.

The product of its digits is 7840, while the sum is 34.

The square root of 112587721 is about 10610.7361196102. The cubic root of 112587721 is about 482.8701318447.

The spelling of 112587721 in words is "one hundred twelve million, five hundred eighty-seven thousand, seven hundred twenty-one".