7001021 has 2 divisors, whose sum is σ = 7001022. Its totient is φ = 7001020.

The previous prime is 7001011. The next prime is 7001041. The reversal of 7001021 is 1201007.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5812921 + 1188100 = 2411^2 + 1090^2 .

It is a cyclic number.

It is not a de Polignac number, because 7001021 - 2¹⁰ = 6999997 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 7000993 and 7001011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7001011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3500510 + 3500511.

It is an arithmetic number, because the mean of its divisors is an integer number (3500511).

Almost surely, 2^7001021 is an apocalyptic number.

It is an amenable number.

7001021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7001021 is an equidigital number, since it uses as much as digits as its factorization.

7001021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14, while the sum is 11.

The square root of 7001021 is about 2645.9442548928. The cubic root of 7001021 is about 191.3024183143.

Subtracting from 7001021 its product of nonzero digits (14), we obtain a palindrome (7001007).

Adding to 7001021 its reverse (1201007), we get a palindrome (8202028).

The spelling of 7001021 in words is "seven million, one thousand, twenty-one".