7021361 has 2 divisors, whose sum is σ = 7021362. Its totient is φ = 7021360.

The previous prime is 7021331. The next prime is 7021363. The reversal of 7021361 is 1631207.

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., 6990736 + 30625 = 2644^2 + 175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7021361 is a prime.

Together with 7021363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7021363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3510680 + 3510681.

It is an arithmetic number, because the mean of its divisors is an integer number (3510681).

Almost surely, 2^7021361 is an apocalyptic number.

It is an amenable number.

7021361 is a deficient number, since it is larger than the sum of its proper divisors (1).

7021361 is an equidigital number, since it uses as much as digits as its factorization.

7021361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 7021361 is about 2649.7850856249. The cubic root of 7021361 is about 191.4875022237.

Adding to 7021361 its reverse (1631207), we get a palindrome (8652568).

The spelling of 7021361 in words is "seven million, twenty-one thousand, three hundred sixty-one".