180005421 has 8 divisors (see below), whose sum is σ = 240198304. Its totient is φ = 119908080.

The previous prime is 180005393. The next prime is 180005473. The reversal of 180005421 is 124500081.

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

It is not a de Polignac number, because 180005421 - 2⁵ = 180005389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180005321) 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, 19366 + ... + 27111.

It is an arithmetic number, because the mean of its divisors is an integer number (30024788).

Almost surely, 2^180005421 is an apocalyptic number.

It is an amenable number.

180005421 is a deficient number, since it is larger than the sum of its proper divisors (60192883).

180005421 is a wasteful number, since it uses less digits than its factorization.

180005421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47771.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 180005421 is about 13416.6098922194. The cubic root of 180005421 is about 564.6272854454.

The spelling of 180005421 in words is "one hundred eighty million, five thousand, four hundred twenty-one".