581612 has 12 divisors (see below), whose sum is σ = 1029000. Its totient is φ = 287616.

The previous prime is 581599. The next prime is 581617. The reversal of 581612 is 216185.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362 + ... + 1137.

It is an arithmetic number, because the mean of its divisors is an integer number (85750).

2⁵⁸¹⁶¹² is an apocalyptic number.

It is an amenable number.

581612 is a deficient number, since it is larger than the sum of its proper divisors (447388).

581612 is a wasteful number, since it uses less digits than its factorization.

581612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600 (or 1598 counting only the distinct ones).

The product of its digits is 480, while the sum is 23.

The square root of 581612 is about 762.6349060986. The cubic root of 581612 is about 83.4726983543.

Adding to 581612 its reverse (216185), we get a palindrome (797797).

The spelling of 581612 in words is "five hundred eighty-one thousand, six hundred twelve".