161168420 has 24 divisors (see below), whose sum is σ = 386804544. Its totient is φ = 55257696.

The previous prime is 161168419. The next prime is 161168437. The reversal of 161168420 is 24861161.

161168420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×161168420³ (a number of 26 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575462 + ... + 575741.

It is an arithmetic number, because the mean of its divisors is an integer number (16116856).

Almost surely, 2^161168420 is an apocalyptic number.

161168420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161168420 is an abundant number, since it is smaller than the sum of its proper divisors (225636124).

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

161168420 is a wasteful number, since it uses less digits than its factorization.

161168420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1151219 (or 1151217 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 161168420 is about 12695.2124834522. The cubic root of 161168420 is about 544.2018111170.

The spelling of 161168420 in words is "one hundred sixty-one million, one hundred sixty-eight thousand, four hundred twenty".