4082021 has 2 divisors, whose sum is σ = 4082022.
Its totient is φ = 4082020.
The previous prime is 4081999. The next prime is 4082027. The reversal of 4082021 is 1202804.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 2608225 + 1473796 = 1615^2 + 1214^2
It is a cyclic number.
It is not a de Polignac number, because 4082021 - 210 = 4080997 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (4082027) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2041010 + 2041011.
It is an arithmetic number, because the mean of its divisors is an integer number (2041011).
Almost surely, 24082021 is an apocalyptic number.
It is an amenable number.
4082021 is a deficient number, since it is larger than the sum of its proper divisors (1).
4082021 is an equidigital number, since it uses as much as digits as its factorization.
4082021 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 128, while the sum is 17.
The square root of 4082021 is about 2020.4011977823.
The cubic root of 4082021 is about 159.8177743109.
Adding to 4082021 its reverse (1202804), we get a palindrome (5284825).
The spelling of 4082021 in words is "four million, eighty-two thousand, twenty-one".