111160561 has 4 divisors (see below), whose sum is σ = 111228912. Its totient is φ = 111092212.

The previous prime is 111160549. The next prime is 111160591. The reversal of 111160561 is 165061111.

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.

It is a cyclic number.

It is not a de Polignac number, because 111160561 - 2⁵ = 111160529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111160591) 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, 31675 + ... + 35008.

It is an arithmetic number, because the mean of its divisors is an integer number (27807228).

Almost surely, 2^111160561 is an apocalyptic number.

It is an amenable number.

111160561 is a deficient number, since it is larger than the sum of its proper divisors (68351).

111160561 is an equidigital number, since it uses as much as digits as its factorization.

111160561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68350.

The product of its (nonzero) digits is 180, while the sum is 22.

The square root of 111160561 is about 10543.2708871583. The cubic root of 111160561 is about 480.8211652726.

The spelling of 111160561 in words is "one hundred eleven million, one hundred sixty thousand, five hundred sixty-one".