427745 has 4 divisors (see below), whose sum is σ = 513300. Its totient is φ = 342192.

The previous prime is 427733. The next prime is 427751. The reversal of 427745 is 547724.

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 58081 + 369664 = 241^2 + 608^2 .

It is a cyclic number.

It is not a de Polignac number, because 427745 - 2⁶ = 427681 is a prime.

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, 42770 + ... + 42779.

It is an arithmetic number, because the mean of its divisors is an integer number (128325).

2⁴²⁷⁷⁴⁵ is an apocalyptic number.

It is an amenable number.

427745 is a deficient number, since it is larger than the sum of its proper divisors (85555).

427745 is an equidigital number, since it uses as much as digits as its factorization.

427745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85554.

The product of its digits is 7840, while the sum is 29.

The square root of 427745 is about 654.0221708780. The cubic root of 427745 is about 75.3462508631.

Subtracting from 427745 its sum of digits (29), we obtain a square (427716 = 654²).

The spelling of 427745 in words is "four hundred twenty-seven thousand, seven hundred forty-five".