4364021 has 2 divisors, whose sum is σ = 4364022. Its totient is φ = 4364020.

The previous prime is 4364011. The next prime is 4364023. The reversal of 4364021 is 1204634.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4363921 + 100 = 2089^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 4364021 - 2¹⁰ = 4362997 is a prime.

Together with 4364023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4363984 and 4364002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4364023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2182010 + 2182011.

It is an arithmetic number, because the mean of its divisors is an integer number (2182011).

Almost surely, 2^4364021 is an apocalyptic number.

It is an amenable number.

4364021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4364021 is an equidigital number, since it uses as much as digits as its factorization.

4364021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 4364021 is about 2089.0239347600. The cubic root of 4364021 is about 163.4163893378.

Adding to 4364021 its reverse (1204634), we get a palindrome (5568655).

The spelling of 4364021 in words is "four million, three hundred sixty-four thousand, twenty-one".