426681 has 8 divisors (see below), whose sum is σ = 632160. Its totient is φ = 284436.

The previous prime is 426661. The next prime is 426691. The reversal of 426681 is 186624.

It is not a de Polignac number, because 426681 - 2⁷ = 426553 is a prime.

It is a super-2 number, since 2×426681² = 364113351522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 15803 = 426681 / (4 + 2 + 6 + 6 + 8 + 1).

It is not an unprimeable number, because it can be changed into a prime (426611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7875 + ... + 7928.

It is an arithmetic number, because the mean of its divisors is an integer number (79020).

2⁴²⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

426681 is a deficient number, since it is larger than the sum of its proper divisors (205479).

426681 is a wasteful number, since it uses less digits than its factorization.

426681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15812 (or 15806 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 426681 is about 653.2082363228. The cubic root of 426681 is about 75.2837253125.

The spelling of 426681 in words is "four hundred twenty-six thousand, six hundred eighty-one".