422751 has 16 divisors (see below), whose sum is σ = 661248. Its totient is φ = 235200.

The previous prime is 422749. The next prime is 422753. The reversal of 422751 is 157224.

It is an interprime number because it is at equal distance from previous prime (422749) and next prime (422753).

It is not a de Polignac number, because 422751 - 2¹ = 422749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422753) 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 15 ways as a sum of consecutive naturals, for example, 616 + ... + 1106.

It is an arithmetic number, because the mean of its divisors is an integer number (41328).

2⁴²²⁷⁵¹ is an apocalyptic number.

422751 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

422751 is a deficient number, since it is larger than the sum of its proper divisors (238497).

422751 is a wasteful number, since it uses less digits than its factorization.

422751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542.

The product of its digits is 560, while the sum is 21.

The square root of 422751 is about 650.1930482557. The cubic root of 422751 is about 75.0518752223.

Adding to 422751 its reverse (157224), we get a palindrome (579975).

It can be divided in two parts, 4227 and 51, that added together give a triangular number (4278 = T₉₂).

The spelling of 422751 in words is "four hundred twenty-two thousand, seven hundred fifty-one".