422659 has 4 divisors (see below), whose sum is σ = 425416. Its totient is φ = 419904.

The previous prime is 422657. The next prime is 422689. The reversal of 422659 is 956224.

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

It is a 6-Lehmer number, since φ(422659) divides (422659-1)⁶.

It is a cyclic number.

It is not a de Polignac number, because 422659 - 2¹ = 422657 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (422657) 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, 1134 + ... + 1459.

It is an arithmetic number, because the mean of its divisors is an integer number (106354).

It is a Poulet number, since it divides 2⁴²²⁶⁵⁸-1.

2⁴²²⁶⁵⁹ is an apocalyptic number.

422659 is a deficient number, since it is larger than the sum of its proper divisors (2757).

422659 is a wasteful number, since it uses less digits than its factorization.

422659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756.

The product of its digits is 4320, while the sum is 28.

The square root of 422659 is about 650.1222961874. The cubic root of 422659 is about 75.0464305094.

It can be divided in two parts, 422 and 659, that added together give a triangular number (1081 = T₄₆).

The spelling of 422659 in words is "four hundred twenty-two thousand, six hundred fifty-nine".