187161 has 8 divisors (see below), whose sum is σ = 268800. Its totient is φ = 115152.

The previous prime is 187141. The next prime is 187163. The reversal of 187161 is 161781.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 187161 - 2⁵ = 187129 is a prime.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (187163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2361 + ... + 2438.

It is an arithmetic number, because the mean of its divisors is an integer number (33600).

2¹⁸⁷¹⁶¹ is an apocalyptic number.

It is an amenable number.

187161 is a deficient number, since it is larger than the sum of its proper divisors (81639).

187161 is a wasteful number, since it uses less digits than its factorization.

187161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4815.

The product of its digits is 336, while the sum is 24.

The square root of 187161 is about 432.6210813171. The cubic root of 187161 is about 57.2011972625.

The spelling of 187161 in words is "one hundred eighty-seven thousand, one hundred sixty-one".