427645 has 12 divisors (see below), whose sum is σ = 536220. Its totient is φ = 327360.

The previous prime is 427621. The next prime is 427681. The reversal of 427645 is 546724.

It can be written as a sum of positive squares in 2 ways, for example, as 116281 + 311364 = 341^2 + 558^2 .

It is not a de Polignac number, because 427645 - 2⁷ = 427517 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 4761 + ... + 4849.

It is an arithmetic number, because the mean of its divisors is an integer number (44685).

2⁴²⁷⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

427645 is a deficient number, since it is larger than the sum of its proper divisors (108575).

427645 is an equidigital number, since it uses as much as digits as its factorization.

427645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 125 counting only the distinct ones).

The product of its digits is 6720, while the sum is 28.

The square root of 427645 is about 653.9457164016. The cubic root of 427645 is about 75.3403788191.

The spelling of 427645 in words is "four hundred twenty-seven thousand, six hundred forty-five".