111534161 has 8 divisors (see below), whose sum is σ = 124310880. Its totient is φ = 99448128.

The previous prime is 111534151. The next prime is 111534167. The reversal of 111534161 is 161435111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 111534161 - 2⁶ = 111534097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (111534167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172331 + ... + 172976.

It is an arithmetic number, because the mean of its divisors is an integer number (15538860).

Almost surely, 2^111534161 is an apocalyptic number.

It is an amenable number.

111534161 is a deficient number, since it is larger than the sum of its proper divisors (12776719).

111534161 is a wasteful number, since it uses less digits than its factorization.

111534161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345343.

The product of its digits is 360, while the sum is 23.

The square root of 111534161 is about 10560.9734873259. The cubic root of 111534161 is about 481.3592275600.

Adding to 111534161 its reverse (161435111), we get a palindrome (272969272).

The spelling of 111534161 in words is "one hundred eleven million, five hundred thirty-four thousand, one hundred sixty-one".