581426 has 8 divisors (see below), whose sum is σ = 885360. Its totient is φ = 286308.

The previous prime is 581411. The next prime is 581429. The reversal of 581426 is 624185.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 581395 and 581404.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 581426.

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

581426 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 2036 + ... + 2303.

It is an arithmetic number, because the mean of its divisors is an integer number (110670).

2⁵⁸¹⁴²⁶ is an apocalyptic number.

581426 is a deficient number, since it is larger than the sum of its proper divisors (303934).

581426 is a wasteful number, since it uses less digits than its factorization.

581426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408.

The product of its digits is 1920, while the sum is 26.

The square root of 581426 is about 762.5129507097. The cubic root of 581426 is about 83.4637991929.

The spelling of 581426 in words is "five hundred eighty-one thousand, four hundred twenty-six".