2421256609 has 2 divisors, whose sum is σ = 2421256610. Its totient is φ = 2421256608.

The previous prime is 2421256589. The next prime is 2421256631. The reversal of 2421256609 is 9066521242.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2334822400 + 86434209 = 48320^2 + 9297^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421256609 - 2⁵ = 2421256577 is a prime.

It is not a weakly prime, because it can be changed into another prime (2421256639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210628304 + 1210628305.

It is an arithmetic number, because the mean of its divisors is an integer number (1210628305).

Almost surely, 2^2421256609 is an apocalyptic number.

It is an amenable number.

2421256609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421256609 is an equidigital number, since it uses as much as digits as its factorization.

2421256609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 2421256609 is about 49206.2659526203. The cubic root of 2421256609 is about 1342.8070304474.

The spelling of 2421256609 in words is "two billion, four hundred twenty-one million, two hundred fifty-six thousand, six hundred nine".