422021 has 4 divisors (see below), whose sum is σ = 425472.
Its totient is φ = 418572.
The previous prime is 421997. The next prime is 422029. The reversal of 422021 is 120224.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 422021 - 210 = 420997 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 421993 and 422011.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (422029) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535 + ... + 1788.
It is an arithmetic number, because the mean of its divisors is an integer number (106368).
2422021 is an apocalyptic number.
It is an amenable number.
422021 is a deficient number, since it is larger than the sum of its proper divisors (3451).
422021 is a wasteful number, since it uses less digits than its factorization.
422021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 3450.
The product of its (nonzero) digits is 32, while the sum is 11.
The square root of 422021 is about 649.6314339685.
The cubic root of 422021 is about 75.0086508540.
Adding to 422021 its reverse (120224), we get a palindrome (542245).
The spelling of 422021 in words is "four hundred twenty-two thousand, twenty-one", and thus it is an iban number.