426566 has 8 divisors (see below), whose sum is σ = 731280. Its totient is φ = 182808.

The previous prime is 426563. The next prime is 426583. The reversal of 426566 is 665624.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426563) 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 3 ways as a sum of consecutive naturals, for example, 15221 + ... + 15248.

It is an arithmetic number, because the mean of its divisors is an integer number (91410).

2⁴²⁶⁵⁶⁶ is an apocalyptic number.

426566 is a deficient number, since it is larger than the sum of its proper divisors (304714).

426566 is a wasteful number, since it uses less digits than its factorization.

426566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30478.

The product of its digits is 8640, while the sum is 29.

The square root of 426566 is about 653.1202033317. The cubic root of 426566 is about 75.2769611598.

The spelling of 426566 in words is "four hundred twenty-six thousand, five hundred sixty-six".