4307021 has 2 divisors, whose sum is σ = 4307022. Its totient is φ = 4307020.

The previous prime is 4306999. The next prime is 4307041. The reversal of 4307021 is 1207034.

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., 3960100 + 346921 = 1990^2 + 589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4307021 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4307041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2153510 + 2153511.

It is an arithmetic number, because the mean of its divisors is an integer number (2153511).

Almost surely, 2^4307021 is an apocalyptic number.

It is an amenable number.

4307021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4307021 is an equidigital number, since it uses as much as digits as its factorization.

4307021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 4307021 is about 2075.3363582803. The cubic root of 4307021 is about 162.7017895544.

The spelling of 4307021 in words is "four million, three hundred seven thousand, twenty-one".