180002 has 4 divisors (see below), whose sum is σ = 270006. Its totient is φ = 90000.

The previous prime is 180001. The next prime is 180007. The reversal of 180002 is 200081.

180002 = T₂₉₈ + T₂₉₉ + ... + T₃₀₁.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 90601 + 89401 = 301^2 + 299^2 .

It is not an unprimeable number, because it can be changed into a prime (180001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44999 + ... + 45002.

2¹⁸⁰⁰⁰² is an apocalyptic number.

180002 is a deficient number, since it is larger than the sum of its proper divisors (90004).

180002 is an equidigital number, since it uses as much as digits as its factorization.

180002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90003.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 180002 is about 424.2664257280. The cubic root of 180002 is about 56.4623708512.

Adding to 180002 its reverse (200081), we get a palindrome (380083).

The spelling of 180002 in words is "one hundred eighty thousand, two".