2997221 has 2 divisors, whose sum is σ = 2997222. Its totient is φ = 2997220.

The previous prime is 2997209. The next prime is 2997227. The reversal of 2997221 is 1227992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1852321 + 1144900 = 1361^2 + 1070^2 .

It is a cyclic number.

It is not a de Polignac number, because 2997221 - 2⁶ = 2997157 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2997227) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1498610 + 1498611.

It is an arithmetic number, because the mean of its divisors is an integer number (1498611).

2^2997221 is an apocalyptic number.

It is an amenable number.

2997221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2997221 is an equidigital number, since it uses as much as digits as its factorization.

2997221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 32.

The square root of 2997221 is about 1731.2483935011. The cubic root of 2997221 is about 144.1804098110.

The spelling of 2997221 in words is "two million, nine hundred ninety-seven thousand, two hundred twenty-one".