180641 has 4 divisors (see below), whose sum is σ = 186900. Its totient is φ = 174384.

The previous prime is 180629. The next prime is 180647. The reversal of 180641 is 146081.

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

It can be written as a sum of positive squares in 2 ways, for example, as 93025 + 87616 = 305^2 + 296^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-180641 is a prime.

It is a Duffinian number.

It is a plaindrome in base 11.

It is a nialpdrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 180641.

It is not an unprimeable number, because it can be changed into a prime (180647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3086 + ... + 3143.

It is an arithmetic number, because the mean of its divisors is an integer number (46725).

2¹⁸⁰⁶⁴¹ is an apocalyptic number.

It is an amenable number.

180641 is a deficient number, since it is larger than the sum of its proper divisors (6259).

180641 is an equidigital number, since it uses as much as digits as its factorization.

180641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6258.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 180641 is about 425.0188231126. The cubic root of 180641 is about 56.5291050087.

The spelling of 180641 in words is "one hundred eighty thousand, six hundred forty-one".