535565 has 16 divisors (see below), whose sum is σ = 684288. Its totient is φ = 401856.

The previous prime is 535547. The next prime is 535571. The reversal of 535565 is 565535.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-535565 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10079 + ... + 10131.

It is an arithmetic number, because the mean of its divisors is an integer number (42768).

2⁵³⁵⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

535565 is a deficient number, since it is larger than the sum of its proper divisors (148723).

535565 is a wasteful number, since it uses less digits than its factorization.

535565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148.

The product of its digits is 11250, while the sum is 29.

The square root of 535565 is about 731.8230660481. The cubic root of 535565 is about 81.2089812677.

The spelling of 535565 in words is "five hundred thirty-five thousand, five hundred sixty-five".