581601 has 8 divisors (see below), whose sum is σ = 809280. Its totient is φ = 370832.

The previous prime is 581599. The next prime is 581617. The reversal of 581601 is 106185.

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

It is a cyclic number.

It is not a de Polignac number, because 581601 - 2¹ = 581599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (581101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4146 + ... + 4283.

It is an arithmetic number, because the mean of its divisors is an integer number (101160).

2⁵⁸¹⁶⁰¹ is an apocalyptic number.

It is an amenable number.

581601 is a deficient number, since it is larger than the sum of its proper divisors (227679).

581601 is a wasteful number, since it uses less digits than its factorization.

581601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8455.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 581601 is about 762.6276942257. The cubic root of 581601 is about 83.4721721126.

Adding to 581601 its reverse (106185), we get a palindrome (687786).

The spelling of 581601 in words is "five hundred eighty-one thousand, six hundred one".