2421242491 has 2 divisors, whose sum is σ = 2421242492. Its totient is φ = 2421242490.

The previous prime is 2421242479. The next prime is 2421242521. The reversal of 2421242491 is 1942421242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2421242491 - 2¹⁹ = 2420718203 is a prime.

It is not a weakly prime, because it can be changed into another prime (2421242191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210621245 + 1210621246.

It is an arithmetic number, because the mean of its divisors is an integer number (1210621246).

Almost surely, 2^2421242491 is an apocalyptic number.

2421242491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421242491 is an equidigital number, since it uses as much as digits as its factorization.

2421242491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

The square root of 2421242491 is about 49206.1224950717. The cubic root of 2421242491 is about 1342.8044205373.

The spelling of 2421242491 in words is "two billion, four hundred twenty-one million, two hundred forty-two thousand, four hundred ninety-one".