2421919 has 2 divisors, whose sum is σ = 2421920. Its totient is φ = 2421918.

The previous prime is 2421917. The next prime is 2421931. The reversal of 2421919 is 9191242.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2421919 - 2¹ = 2421917 is a prime.

It is a super-2 number, since 2×2421919² = 11731383285122, which contains 22 as substring.

Together with 2421917, it forms a pair of twin primes.

2421919 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1210959 + 1210960.

It is an arithmetic number, because the mean of its divisors is an integer number (1210960).

2^2421919 is an apocalyptic number.

2421919 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421919 is an equidigital number, since it uses as much as digits as its factorization.

2421919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 2421919 is about 1556.2515863446. The cubic root of 2421919 is about 134.2929471303.

The spelling of 2421919 in words is "two million, four hundred twenty-one thousand, nine hundred nineteen".