112136561 has 4 divisors (see below), whose sum is σ = 114744432. Its totient is φ = 109528692.

The previous prime is 112136527. The next prime is 112136587. The reversal of 112136561 is 165631211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 165631211 = 23 ⋅7201357.

It is a cyclic number.

It is not a de Polignac number, because 112136561 - 2¹⁰ = 112135537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 112136561.

It is not an unprimeable number, because it can be changed into a prime (112136261) 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, 1303871 + ... + 1303956.

It is an arithmetic number, because the mean of its divisors is an integer number (28686108).

Almost surely, 2^112136561 is an apocalyptic number.

It is an amenable number.

112136561 is a deficient number, since it is larger than the sum of its proper divisors (2607871).

112136561 is an equidigital number, since it uses as much as digits as its factorization.

112136561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2607870.

The product of its digits is 1080, while the sum is 26.

The square root of 112136561 is about 10589.4551795642. The cubic root of 112136561 is about 482.2242848344.

Adding to 112136561 its reverse (165631211), we get a palindrome (277767772).

The spelling of 112136561 in words is "one hundred twelve million, one hundred thirty-six thousand, five hundred sixty-one".