180520121 has 8 divisors (see below), whose sum is σ = 190161600. Its totient is φ = 170892720.

The previous prime is 180520111. The next prime is 180520129. The reversal of 180520121 is 121025081.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 180520121 - 2⁶ = 180520057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 180520093 and 180520102.

It is not an unprimeable number, because it can be changed into a prime (180520129) 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, 32195 + ... + 37383.

It is an arithmetic number, because the mean of its divisors is an integer number (23770200).

Almost surely, 2^180520121 is an apocalyptic number.

It is an amenable number.

180520121 is a deficient number, since it is larger than the sum of its proper divisors (9641479).

180520121 is a wasteful number, since it uses less digits than its factorization.

180520121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7039.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 180520121 is about 13435.7776477582. Note that the first 3 decimals coincide. The cubic root of 180520121 is about 565.1649305745.

The spelling of 180520121 in words is "one hundred eighty million, five hundred twenty thousand, one hundred twenty-one".