1244819 has 2 divisors, whose sum is σ = 1244820. Its totient is φ = 1244818.

The previous prime is 1244813. The next prime is 1244821. The reversal of 1244819 is 9184421.

It is a strong prime.

It is an emirp because it is prime and its reverse (9184421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1244819 is a prime.

It is a super-2 number, since 2×1244819² = 3099148685522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1244821, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1244791 and 1244800.

It is not a weakly prime, because it can be changed into another prime (1244813) 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, 622409 + 622410.

It is an arithmetic number, because the mean of its divisors is an integer number (622410).

2^1244819 is an apocalyptic number.

1244819 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244819 is an equidigital number, since it uses as much as digits as its factorization.

1244819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 29.

The square root of 1244819 is about 1115.7145692335. The cubic root of 1244819 is about 107.5727000572.

The spelling of 1244819 in words is "one million, two hundred forty-four thousand, eight hundred nineteen".