426669 has 4 divisors (see below), whose sum is σ = 568896. Its totient is φ = 284444.

The previous prime is 426661. The next prime is 426691. The reversal of 426669 is 966624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 426669 - 2³ = 426661 is a prime.

It is a super-2 number, since 2×426669² = 364092871122, which contains 22 as substring.

It is a D-number.

It is a Curzon 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 426669.

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, 71109 + ... + 71114.

It is an arithmetic number, because the mean of its divisors is an integer number (142224).

2⁴²⁶⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

426669 is a deficient number, since it is larger than the sum of its proper divisors (142227).

426669 is a wasteful number, since it uses less digits than its factorization.

426669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142226.

The product of its digits is 15552, while the sum is 33.

The square root of 426669 is about 653.1990508260. The cubic root of 426669 is about 75.2830195447.

The spelling of 426669 in words is "four hundred twenty-six thousand, six hundred sixty-nine".