581422 has 4 divisors (see below), whose sum is σ = 872136. Its totient is φ = 290710.

The previous prime is 581411. The next prime is 581429. The reversal of 581422 is 224185.

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

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 581393 and 581402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145354 + ... + 145357.

It is an arithmetic number, because the mean of its divisors is an integer number (218034).

2⁵⁸¹⁴²² is an apocalyptic number.

581422 is a deficient number, since it is larger than the sum of its proper divisors (290714).

581422 is a wasteful number, since it uses less digits than its factorization.

581422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290713.

The product of its digits is 640, while the sum is 22.

The square root of 581422 is about 762.5103277989. The cubic root of 581422 is about 83.4636077922.

The spelling of 581422 in words is "five hundred eighty-one thousand, four hundred twenty-two".