4162021 has 2 divisors, whose sum is σ = 4162022.
Its totient is φ = 4162020.
The previous prime is 4162009. The next prime is 4162027. The reversal of 4162021 is 1202614.
Adding to 4162021 its reverse (1202614), we get a palindrome (5364635).
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 3101121 + 1060900 = 1761^2 + 1030^2
It is a cyclic number.
It is not a de Polignac number, because 4162021 - 211 = 4159973 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 4161986 and 4162004.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (4162027) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2081010 + 2081011.
It is an arithmetic number, because the mean of its divisors is an integer number (2081011).
Almost surely, 24162021 is an apocalyptic number.
It is an amenable number.
4162021 is a deficient number, since it is larger than the sum of its proper divisors (1).
4162021 is an equidigital number, since it uses as much as digits as its factorization.
4162021 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 96, while the sum is 16.
The square root of 4162021 is about 2040.1031836650.
The cubic root of 4162021 is about 160.8550706359.
The spelling of 4162021 in words is "four million, one hundred sixty-two thousand, twenty-one".