161472140 has 12 divisors (see below), whose sum is σ = 339091536. Its totient is φ = 64588848.

The previous prime is 161472139. The next prime is 161472187. The reversal of 161472140 is 41274161.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4036784 + ... + 4036823.

It is an arithmetic number, because the mean of its divisors is an integer number (28257628).

Almost surely, 2^161472140 is an apocalyptic number.

161472140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161472140 is an abundant number, since it is smaller than the sum of its proper divisors (177619396).

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

161472140 is a wasteful number, since it uses less digits than its factorization.

161472140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8073616 (or 8073614 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 161472140 is about 12707.1688428225. The cubic root of 161472140 is about 544.5434439190.

The spelling of 161472140 in words is "one hundred sixty-one million, four hundred seventy-two thousand, one hundred forty".