46581 has 4 divisors (see below), whose sum is σ = 62112. Its totient is φ = 31052.

The previous prime is 46573. The next prime is 46589. The reversal of 46581 is 18564.

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.

It is an interprime number because it is at equal distance from previous prime (46573) and next prime (46589).

It is a cyclic number.

It is not a de Polignac number, because 46581 - 2³ = 46573 is a prime.

It is a super-2 number, since 2×46581² = 4339579122, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (46589) 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, 7761 + ... + 7766.

It is an arithmetic number, because the mean of its divisors is an integer number (15528).

2⁴⁶⁵⁸¹ is an apocalyptic number.

46581 is the 137-th centered pentagonal number.

It is an amenable number.

46581 is a deficient number, since it is larger than the sum of its proper divisors (15531).

46581 is a wasteful number, since it uses less digits than its factorization.

46581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15530.

The product of its digits is 960, while the sum is 24.

The square root of 46581 is about 215.8263190623. The cubic root of 46581 is about 35.9806995309.

The spelling of 46581 in words is "forty-six thousand, five hundred eighty-one".