180946 has 4 divisors (see below), whose sum is σ = 271422. Its totient is φ = 90472.

The previous prime is 180907. The next prime is 180949. The reversal of 180946 is 649081.

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., 130321 + 50625 = 361^2 + 225^2 .

It is not an unprimeable number, because it can be changed into a prime (180949) by changing a digit.

180946 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45235 + ... + 45238.

2¹⁸⁰⁹⁴⁶ is an apocalyptic number.

180946 is a deficient number, since it is larger than the sum of its proper divisors (90476).

180946 is an equidigital number, since it uses as much as digits as its factorization.

180946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90475.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 180946 is about 425.3774794227. The cubic root of 180946 is about 56.5609022981.

The spelling of 180946 in words is "one hundred eighty thousand, nine hundred forty-six".