426815 has 4 divisors (see below), whose sum is σ = 512184. Its totient is φ = 341448.

The previous prime is 426799. The next prime is 426841. The reversal of 426815 is 518624.

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

It is a cyclic number.

It is not a de Polignac number, because 426815 - 2⁴ = 426799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 426815.

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 3 ways as a sum of consecutive naturals, for example, 42677 + ... + 42686.

It is an arithmetic number, because the mean of its divisors is an integer number (128046).

2⁴²⁶⁸¹⁵ is an apocalyptic number.

426815 is a deficient number, since it is larger than the sum of its proper divisors (85369).

426815 is an equidigital number, since it uses as much as digits as its factorization.

426815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85368.

The product of its digits is 1920, while the sum is 26.

The square root of 426815 is about 653.3107989311. The cubic root of 426815 is about 75.2916054879.

Subtracting 426815 from its reverse (518624), we obtain a square (91809 = 303²).

The spelling of 426815 in words is "four hundred twenty-six thousand, eight hundred fifteen".