4700021 has 2 divisors, whose sum is σ = 4700022. Its totient is φ = 4700020.

The previous prime is 4699997. The next prime is 4700023. The reversal of 4700021 is 1200074.

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., 4120900 + 579121 = 2030^2 + 761^2 .

It is a cyclic number.

It is not a de Polignac number, because 4700021 - 2¹⁸ = 4437877 is a prime.

It is a Sophie Germain prime.

Together with 4700023, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4699969 and 4700005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4700023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2350010 + 2350011.

It is an arithmetic number, because the mean of its divisors is an integer number (2350011).

Almost surely, 2^4700021 is an apocalyptic number.

It is an amenable number.

4700021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4700021 is an equidigital number, since it uses as much as digits as its factorization.

4700021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 4700021 is about 2167.9531821513. The cubic root of 4700021 is about 167.5071178382.

Adding to 4700021 its reverse (1200074), we get a palindrome (5900095).

The spelling of 4700021 in words is "four million, seven hundred thousand, twenty-one".