2421817 has 2 divisors, whose sum is σ = 2421818. Its totient is φ = 2421816.

The previous prime is 2421791. The next prime is 2421821. The reversal of 2421817 is 7181242.

It is a happy number.

2421817 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2134521 + 287296 = 1461^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 2421817 - 2¹⁹ = 1897529 is a prime.

2421817 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2421791 and 2421800.

It is not a weakly prime, because it can be changed into another prime (2421847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210908 + 1210909.

It is an arithmetic number, because the mean of its divisors is an integer number (1210909).

2^2421817 is an apocalyptic number.

It is an amenable number.

2421817 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421817 is an equidigital number, since it uses as much as digits as its factorization.

2421817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 25.

The square root of 2421817 is about 1556.2188149486. The cubic root of 2421817 is about 134.2910618384.

The spelling of 2421817 in words is "two million, four hundred twenty-one thousand, eight hundred seventeen".