380581 has 4 divisors (see below), whose sum is σ = 397152. Its totient is φ = 364012.

The previous prime is 380563. The next prime is 380591. The reversal of 380581 is 185083.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 185083 = 59 ⋅3137.

It is a cyclic number.

It is not a de Polignac number, because 380581 - 2⁷ = 380453 is a prime.

It is a super-2 number, since 2×380581² = 289683795122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8251 + ... + 8296.

It is an arithmetic number, because the mean of its divisors is an integer number (99288).

2³⁸⁰⁵⁸¹ is an apocalyptic number.

It is an amenable number.

380581 is a deficient number, since it is larger than the sum of its proper divisors (16571).

380581 is a wasteful number, since it uses less digits than its factorization.

380581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16570.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 380581 is about 616.9124735325. The cubic root of 380581 is about 72.4684603201.

It can be divided in two parts, 380 and 581, that multiplied together give a triangular number (220780 = T₆₆₄).

The spelling of 380581 in words is "three hundred eighty thousand, five hundred eighty-one".