427985 has 4 divisors (see below), whose sum is σ = 513588. Its totient is φ = 342384.

The previous prime is 427969. The next prime is 427991. The reversal of 427985 is 589724.

It is a happy number.

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 59536 + 368449 = 244^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 427985 - 2⁴ = 427969 is a prime.

It is a d-powerful number, because it can be written as 4⁶ + 2¹⁴ + 9 + 7⁵ + 8² + 5⁸ .

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 427985.

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, 42794 + ... + 42803.

It is an arithmetic number, because the mean of its divisors is an integer number (128397).

2⁴²⁷⁹⁸⁵ is an apocalyptic number.

It is an amenable number.

427985 is a deficient number, since it is larger than the sum of its proper divisors (85603).

427985 is an equidigital number, since it uses as much as digits as its factorization.

427985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85602.

The product of its digits is 20160, while the sum is 35.

The square root of 427985 is about 654.2056251669. The cubic root of 427985 is about 75.3603400355.

The spelling of 427985 in words is "four hundred twenty-seven thousand, nine hundred eighty-five".