2299021 has 2 divisors, whose sum is σ = 2299022. Its totient is φ = 2299020.

The previous prime is 2299001. The next prime is 2299039. The reversal of 2299021 is 1209922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1276900 + 1022121 = 1130^2 + 1011^2 .

It is a cyclic number.

It is not a de Polignac number, because 2299021 - 2¹³ = 2290829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2299001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1149510 + 1149511.

It is an arithmetic number, because the mean of its divisors is an integer number (1149511).

2^2299021 is an apocalyptic number.

It is an amenable number.

2299021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2299021 is an equidigital number, since it uses as much as digits as its factorization.

2299021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2299021 is about 1516.2522877147. The cubic root of 2299021 is about 131.9818807391.

The spelling of 2299021 in words is "two million, two hundred ninety-nine thousand, twenty-one".