4021013 has 2 divisors, whose sum is σ = 4021014. Its totient is φ = 4021012.

The previous prime is 4021009. The next prime is 4021019. The reversal of 4021013 is 3101204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3602404 + 418609 = 1898^2 + 647^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021013 - 2² = 4021009 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 4020985 and 4021003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4021019) 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, 2010506 + 2010507.

It is an arithmetic number, because the mean of its divisors is an integer number (2010507).

Almost surely, 2^4021013 is an apocalyptic number.

It is an amenable number.

4021013 is a deficient number, since it is larger than the sum of its proper divisors (1).

4021013 is an equidigital number, since it uses as much as digits as its factorization.

4021013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 4021013 is about 2005.2463689033. The cubic root of 4021013 is about 159.0175870213.

Adding to 4021013 its reverse (3101204), we get a palindrome (7122217).

The spelling of 4021013 in words is "four million, twenty-one thousand, thirteen".