422781 has 8 divisors (see below), whose sum is σ = 574560. Its totient is φ = 276432.

The previous prime is 422761. The next prime is 422789. The reversal of 422781 is 187224.

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

It is not a de Polignac number, because 422781 - 2⁵ = 422749 is a prime.

It is a super-2 number, since 2×422781² = 357487547922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1171 + ... + 1488.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2⁴²²⁷⁸¹ is an apocalyptic number.

It is an amenable number.

422781 is a deficient number, since it is larger than the sum of its proper divisors (151779).

422781 is a wasteful number, since it uses less digits than its factorization.

422781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2715.

The product of its digits is 896, while the sum is 24.

The square root of 422781 is about 650.2161179177. The cubic root of 422781 is about 75.0536505014.

The spelling of 422781 in words is "four hundred twenty-two thousand, seven hundred eighty-one".