565481 has 4 divisors (see below), whose sum is σ = 646272. Its totient is φ = 484692.

The previous prime is 565469. The next prime is 565483. The reversal of 565481 is 184565.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 184565 = 5 ⋅36913.

It is a cyclic number.

It is not a de Polignac number, because 565481 - 2¹⁰ = 564457 is a prime.

It is a super-2 number, since 2×565481² = 639537522722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 565481.

It is not an unprimeable number, because it can be changed into a prime (565483) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40385 + ... + 40398.

It is an arithmetic number, because the mean of its divisors is an integer number (161568).

2⁵⁶⁵⁴⁸¹ is an apocalyptic number.

It is an amenable number.

565481 is a deficient number, since it is larger than the sum of its proper divisors (80791).

565481 is an equidigital number, since it uses as much as digits as its factorization.

565481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80790.

The product of its digits is 4800, while the sum is 29.

The square root of 565481 is about 751.9847072913. The cubic root of 565481 is about 82.6937472701.

It can be divided in two parts, 56 and 5481, that multiplied together give a triangular number (306936 = T₇₈₃).

The spelling of 565481 in words is "five hundred sixty-five thousand, four hundred eighty-one".