420022 has 4 divisors (see below), whose sum is σ = 630036. Its totient is φ = 210010.

The previous prime is 420001. The next prime is 420029. The reversal of 420022 is 220024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 419990 and 420008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420029) by changing a digit.

420022 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105004 + ... + 105007.

It is an arithmetic number, because the mean of its divisors is an integer number (157509).

2⁴²⁰⁰²² is an apocalyptic number.

420022 is a deficient number, since it is larger than the sum of its proper divisors (210014).

420022 is a wasteful number, since it uses less digits than its factorization.

420022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210013.

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 420022 is about 648.0910429870. The cubic root of 420022 is about 74.8900314302.

Adding to 420022 its reverse (220024), we get a palindrome (640046).

The spelling of 420022 in words is "four hundred twenty thousand, twenty-two", and thus it is an iban number.