161380 has 12 divisors (see below), whose sum is σ = 338940. Its totient is φ = 64544.

The previous prime is 161377. The next prime is 161387. The reversal of 161380 is 83161.

161380 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 2 ways, for example, as 18496 + 142884 = 136^2 + 378^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4015 + ... + 4054.

It is an arithmetic number, because the mean of its divisors is an integer number (28245).

2¹⁶¹³⁸⁰ is an apocalyptic number.

161380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161380 is an abundant number, since it is smaller than the sum of its proper divisors (177560).

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

161380 is a wasteful number, since it uses less digits than its factorization.

161380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8078 (or 8076 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 161380 is about 401.7212964233. The cubic root of 161380 is about 54.4439847556.

The spelling of 161380 in words is "one hundred sixty-one thousand, three hundred eighty".