1244120287 has 2 divisors, whose sum is σ = 1244120288. Its totient is φ = 1244120286.

The previous prime is 1244120279. The next prime is 1244120327. The reversal of 1244120287 is 7820214421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1244120287 - 2³ = 1244120279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244120237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622060143 + 622060144.

It is an arithmetic number, because the mean of its divisors is an integer number (622060144).

Almost surely, 2^1244120287 is an apocalyptic number.

1244120287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244120287 is an equidigital number, since it uses as much as digits as its factorization.

1244120287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 1244120287 is about 35272.0893483786. The cubic root of 1244120287 is about 1075.5256955060.

The spelling of 1244120287 in words is "one billion, two hundred forty-four million, one hundred twenty thousand, two hundred eighty-seven".