2402421209 has 2 divisors, whose sum is σ = 2402421210. Its totient is φ = 2402421208.

The previous prime is 2402421187. The next prime is 2402421221. The reversal of 2402421209 is 9021242042.

It is a happy number.

2402421209 is nontrivially palindromic in base 12.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1499238400 + 903182809 = 38720^2 + 30053^2 .

It is a cyclic number.

It is not a de Polignac number, because 2402421209 - 2¹² = 2402417113 is a prime.

It is not a weakly prime, because it can be changed into another prime (2402421299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1201210604 + 1201210605.

It is an arithmetic number, because the mean of its divisors is an integer number (1201210605).

Almost surely, 2^2402421209 is an apocalyptic number.

It is an amenable number.

2402421209 is a deficient number, since it is larger than the sum of its proper divisors (1).

2402421209 is an equidigital number, since it uses as much as digits as its factorization.

2402421209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 2402421209 is about 49014.4999872487. The cubic root of 2402421209 is about 1339.3159813686.

The spelling of 2402421209 in words is "two billion, four hundred two million, four hundred twenty-one thousand, two hundred nine".