161120204 has 24 divisors (see below), whose sum is σ = 322613760. Its totient is φ = 68971536.

The previous prime is 161120161. The next prime is 161120207. The reversal of 161120204 is 402021161.

It is not an unprimeable number, because it can be changed into a prime (161120207) 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 7 ways as a sum of consecutive naturals, for example, 25709 + ... + 31355.

It is an arithmetic number, because the mean of its divisors is an integer number (13442240).

Almost surely, 2^161120204 is an apocalyptic number.

161120204 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

161120204 is an abundant number, since it is smaller than the sum of its proper divisors (161493556).

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

161120204 is a wasteful number, since it uses less digits than its factorization.

161120204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6677 (or 6675 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 161120204 is about 12693.3133578274. The cubic root of 161120204 is about 544.1475369368.

Adding to 161120204 its reverse (402021161), we get a palindrome (563141365).

The spelling of 161120204 in words is "one hundred sixty-one million, one hundred twenty thousand, two hundred four".