426785 has 8 divisors (see below), whose sum is σ = 542376. Its totient is φ = 321280.

The previous prime is 426779. The next prime is 426787. The reversal of 426785 is 587624.

It can be written as a sum of positive squares in 4 ways, for example, as 179776 + 247009 = 424^2 + 497^2 .

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

It is not a de Polignac number, because 426785 - 2¹² = 422689 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (426787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2426 + ... + 2595.

It is an arithmetic number, because the mean of its divisors is an integer number (67797).

2⁴²⁶⁷⁸⁵ is an apocalyptic number.

It is an amenable number.

426785 is a deficient number, since it is larger than the sum of its proper divisors (115591).

426785 is a wasteful number, since it uses less digits than its factorization.

426785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5043.

The product of its digits is 13440, while the sum is 32.

The square root of 426785 is about 653.2878385520. The cubic root of 426785 is about 75.2898414128.

The spelling of 426785 in words is "four hundred twenty-six thousand, seven hundred eighty-five".