161204112 has 30 divisors (see below), whose sum is σ = 451148022. Its totient is φ = 53734656.

The previous prime is 161204089. The next prime is 161204137. The reversal of 161204112 is 211402161.

161204112 is a `hidden beast` number, since 1 + 612 + 0 + 41 + 12 = 666.

161204112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 159365376 + 1838736 = 12624^2 + 1356^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 559593 + ... + 559880.

Almost surely, 2^161204112 is an apocalyptic number.

161204112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161204112 is an abundant number, since it is smaller than the sum of its proper divisors (289943910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161204112 is a wasteful number, since it uses less digits than its factorization.

161204112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119487 (or 1119478 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 161204112 is about 12696.6181324005. The cubic root of 161204112 is about 544.2419807262.

Adding to 161204112 its reverse (211402161), we get a palindrome (372606273).

The spelling of 161204112 in words is "one hundred sixty-one million, two hundred four thousand, one hundred twelve".