536581 has 4 divisors (see below), whose sum is σ = 542700. Its totient is φ = 530464.

The previous prime is 536563. The next prime is 536593. The reversal of 536581 is 185635.

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

It can be written as a sum of positive squares in 2 ways, for example, as 320356 + 216225 = 566^2 + 465^2 .

It is a cyclic number.

It is not a de Polignac number, because 536581 - 2⁷ = 536453 is a prime.

It is a super-2 number, since 2×536581² = 575838339122, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (536531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2926 + ... + 3103.

It is an arithmetic number, because the mean of its divisors is an integer number (135675).

2⁵³⁶⁵⁸¹ is an apocalyptic number.

It is an amenable number.

536581 is a deficient number, since it is larger than the sum of its proper divisors (6119).

536581 is an equidigital number, since it uses as much as digits as its factorization.

536581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6118.

The product of its digits is 3600, while the sum is 28.

The square root of 536581 is about 732.5168940031. The cubic root of 536581 is about 81.2603016524.

The spelling of 536581 in words is "five hundred thirty-six thousand, five hundred eighty-one".