565554 has 48 divisors (see below), whose sum is σ = 1340640. Its totient is φ = 158400.

The previous prime is 565553. The next prime is 565559. The reversal of 565554 is 455565.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565553) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 13774 + ... + 13814.

It is an arithmetic number, because the mean of its divisors is an integer number (27930).

2⁵⁶⁵⁵⁵⁴ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 565554, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (670320).

565554 is an abundant number, since it is smaller than the sum of its proper divisors (775086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

565554 is a wasteful number, since it uses less digits than its factorization.

565554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87 (or 76 counting only the distinct ones).

The product of its digits is 15000, while the sum is 30.

The square root of 565554 is about 752.0332439460. The cubic root of 565554 is about 82.6973055292.

The spelling of 565554 in words is "five hundred sixty-five thousand, five hundred fifty-four".