7037221 has 2 divisors, whose sum is σ = 7037222. Its totient is φ = 7037220.

The previous prime is 7037209. The next prime is 7037231. The reversal of 7037221 is 1227307.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6964321 + 72900 = 2639^2 + 270^2 .

It is a cyclic number.

It is not a de Polignac number, because 7037221 - 2⁹ = 7036709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7037192 and 7037201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7037231) 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, 3518610 + 3518611.

It is an arithmetic number, because the mean of its divisors is an integer number (3518611).

Almost surely, 2^7037221 is an apocalyptic number.

It is an amenable number.

7037221 is a deficient number, since it is larger than the sum of its proper divisors (1).

7037221 is an equidigital number, since it uses as much as digits as its factorization.

7037221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 7037221 is about 2652.7760930768. The cubic root of 7037221 is about 191.6315724866.

The spelling of 7037221 in words is "seven million, thirty-seven thousand, two hundred twenty-one".