426667 has 4 divisors (see below), whose sum is σ = 430056. Its totient is φ = 423280.

The previous prime is 426661. The next prime is 426691. The reversal of 426667 is 766624.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426667 is a prime.

It is a Duffinian number.

426667 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (426661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1498 + ... + 1759.

It is an arithmetic number, because the mean of its divisors is an integer number (107514).

2⁴²⁶⁶⁶⁷ is an apocalyptic number.

426667 is a deficient number, since it is larger than the sum of its proper divisors (3389).

426667 is a wasteful number, since it uses less digits than its factorization.

426667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388.

The product of its digits is 12096, while the sum is 31.

The square root of 426667 is about 653.1975198973. The cubic root of 426667 is about 75.2829019154.

The spelling of 426667 in words is "four hundred twenty-six thousand, six hundred sixty-seven".