427565 has 4 divisors (see below), whose sum is σ = 513084. Its totient is φ = 342048.

The previous prime is 427541. The next prime is 427579. The reversal of 427565 is 565724.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 175561 + 252004 = 419^2 + 502^2 .

It is a cyclic number.

It is not a de Polignac number, because 427565 - 2⁸ = 427309 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42752 + ... + 42761.

It is an arithmetic number, because the mean of its divisors is an integer number (128271).

2⁴²⁷⁵⁶⁵ is an apocalyptic number.

It is an amenable number.

427565 is a deficient number, since it is larger than the sum of its proper divisors (85519).

427565 is an equidigital number, since it uses as much as digits as its factorization.

427565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85518.

The product of its digits is 8400, while the sum is 29.

The square root of 427565 is about 653.8845463841. The cubic root of 427565 is about 75.3356805248.

The spelling of 427565 in words is "four hundred twenty-seven thousand, five hundred sixty-five".