565278 has 32 divisors (see below), whose sum is σ = 1326336. Its totient is φ = 157248.

The previous prime is 565273. The next prime is 565283. The reversal of 565278 is 872565.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (565273) and next prime (565283).

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565273) 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 15 ways as a sum of consecutive naturals, for example, 1650 + ... + 1962.

It is an arithmetic number, because the mean of its divisors is an integer number (41448).

2⁵⁶⁵²⁷⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 565278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (663168).

565278 is an abundant number, since it is smaller than the sum of its proper divisors (761058).

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

565278 is a wasteful number, since it uses less digits than its factorization.

565278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368.

The product of its digits is 16800, while the sum is 33.

The square root of 565278 is about 751.8497190263. The cubic root of 565278 is about 82.6838507750.

The spelling of 565278 in words is "five hundred sixty-five thousand, two hundred seventy-eight".