161421160 has 32 divisors (see below), whose sum is σ = 363981600. Its totient is φ = 64429120.

The previous prime is 161421151. The next prime is 161421173. The reversal of 161421160 is 61124161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15531 + ... + 23749.

It is an arithmetic number, because the mean of its divisors is an integer number (11374425).

Almost surely, 2^161421160 is an apocalyptic number.

161421160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161421160 is an abundant number, since it is smaller than the sum of its proper divisors (202560440).

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

161421160 is a wasteful number, since it uses less digits than its factorization.

161421160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8721 (or 8717 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 161421160 is about 12705.1627301660. The cubic root of 161421160 is about 544.4861301169.

The spelling of 161421160 in words is "one hundred sixty-one million, four hundred twenty-one thousand, one hundred sixty".