422420 has 12 divisors (see below), whose sum is σ = 887124. Its totient is φ = 168960.

The previous prime is 422407. The next prime is 422431. The reversal of 422420 is 24224.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 232324 + 190096 = 482^2 + 436^2 .

It is a hoax number, since the sum of its digits (14) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 422395 and 422404.

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 422420.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10541 + ... + 10580.

It is an arithmetic number, because the mean of its divisors is an integer number (73927).

2⁴²²⁴²⁰ is an apocalyptic number.

It is an amenable number.

422420 is an abundant number, since it is smaller than the sum of its proper divisors (464704).

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

422420 is a wasteful number, since it uses less digits than its factorization.

422420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21130 (or 21128 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 422420 is about 649.9384586251. The cubic root of 422420 is about 75.0322823989.

Adding to 422420 its reverse (24224), we get a palindrome (446644).

The spelling of 422420 in words is "four hundred twenty-two thousand, four hundred twenty", and thus it is an iban number.