427765 has 8 divisors (see below), whose sum is σ = 552888. Its totient is φ = 315840.

The previous prime is 427751. The next prime is 427781. The reversal of 427765 is 567724.

It can be written as a sum of positive squares in 4 ways, for example, as 49 + 427716 = 7^2 + 654^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 427765 - 2⁵ = 427733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3226 + ... + 3355.

It is an arithmetic number, because the mean of its divisors is an integer number (69111).

427765 is a Friedman number, since it can be written as 654^2+7*7, using all its digits and the basic arithmetic operations.

2⁴²⁷⁷⁶⁵ is an apocalyptic number.

It is an amenable number.

427765 is a deficient number, since it is larger than the sum of its proper divisors (125123).

427765 is a wasteful number, since it uses less digits than its factorization.

427765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6599.

The product of its digits is 11760, while the sum is 31.

The square root of 427765 is about 654.0374607008. The cubic root of 427765 is about 75.3474251620.

The spelling of 427765 in words is "four hundred twenty-seven thousand, seven hundred sixty-five".