565403 has 8 divisors (see below), whose sum is σ = 607680. Its totient is φ = 524160.

The previous prime is 565393. The next prime is 565427. The reversal of 565403 is 304565.

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 565403 - 2⁴ = 565387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 565403.

It is not an unprimeable number, because it can be changed into a prime (565463) 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, 1133 + ... + 1553.

It is an arithmetic number, because the mean of its divisors is an integer number (75960).

2⁵⁶⁵⁴⁰³ is an apocalyptic number.

565403 is a deficient number, since it is larger than the sum of its proper divisors (42277).

565403 is a wasteful number, since it uses less digits than its factorization.

565403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 565403 is about 751.9328427459. The cubic root of 565403 is about 82.6899449561.

Adding to 565403 its reverse (304565), we get a palindrome (869968).

The spelling of 565403 in words is "five hundred sixty-five thousand, four hundred three".