423522 has 64 divisors (see below), whose sum is σ = 1105920. Its totient is φ = 118800.

The previous prime is 423509. The next prime is 423541. The reversal of 423522 is 225324.

423522 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a d-powerful number, because it can be written as 4² + 2⁵ + 5⁸ + 3⁴ + 2¹⁴ + 2¹⁴ .

It is a junction number, because it is equal to n+sod(n) for n = 423495 and 423504.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13647 + ... + 13677.

It is an arithmetic number, because the mean of its divisors is an integer number (17280).

2⁴²³⁵²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 423522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552960).

423522 is an abundant number, since it is smaller than the sum of its proper divisors (682398).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

423522 is a wasteful number, since it uses less digits than its factorization.

423522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 70 counting only the distinct ones).

The product of its digits is 480, while the sum is 18.

The square root of 423522 is about 650.7856790065. The cubic root of 423522 is about 75.0974732646.

Adding to 423522 its reverse (225324), we get a palindrome (648846).

The spelling of 423522 in words is "four hundred twenty-three thousand, five hundred twenty-two".