2422021 has 6 divisors (see below), whose sum is σ = 2817510.
Its totient is φ = 2075976.
The previous prime is 2421997. The next prime is 2422027. The reversal of 2422021 is 1202242.
Adding to 2422021 its reverse (1202242), we get a palindrome (3624263).
2422021 = T103 + T104 + ... +
It can be written as a sum of positive squares in only one way, i.e., 2160900 + 261121 = 1470^2 + 511^2
It is not a de Polignac number, because 2422021 - 25 = 2421989 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 2421992 and 2422010.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2422027) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24666 + ... + 24763.
It is an arithmetic number, because the mean of its divisors is an integer number (469585).
22422021 is an apocalyptic number.
It is an amenable number.
2422021 is a deficient number, since it is larger than the sum of its proper divisors (395489).
2422021 is an equidigital number, since it uses as much as digits as its factorization.
2422021 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 49443 (or 49436 counting only the distinct ones).
The product of its (nonzero) digits is 64, while the sum is 13.
The square root of 2422021 is about 1556.2843570505.
The cubic root of 2422021 is about 134.2948323693.
The spelling of 2422021 in words is "two million, four hundred twenty-two thousand, twenty-one".