180115 has 16 divisors (see below), whose sum is σ = 247968. Its totient is φ = 124416.

The previous prime is 180097. The next prime is 180137. The reversal of 180115 is 511081.

It is a 9-Lehmer number, since φ(180115) divides (180115-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 180115 - 2⁹ = 179603 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1024 + ... + 1186.

It is an arithmetic number, because the mean of its divisors is an integer number (15498).

2¹⁸⁰¹¹⁵ is an apocalyptic number.

180115 is a deficient number, since it is larger than the sum of its proper divisors (67853).

180115 is a wasteful number, since it uses less digits than its factorization.

180115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198.

The product of its (nonzero) digits is 40, while the sum is 16.

The square root of 180115 is about 424.3995758716. The cubic root of 180115 is about 56.4741835223.

Adding to 180115 its reverse (511081), we get a palindrome (691196).

The spelling of 180115 in words is "one hundred eighty thousand, one hundred fifteen".