1249288445243 has 2 divisors, whose sum is σ = 1249288445244. Its totient is φ = 1249288445242.

The previous prime is 1249288445233. The next prime is 1249288445281. The reversal of 1249288445243 is 3425448829421.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3425448829421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1249288445243 - 2⁶ = 1249288445179 is a prime.

It is not a weakly prime, because it can be changed into another prime (1249288445213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624644222621 + 624644222622.

It is an arithmetic number, because the mean of its divisors is an integer number (624644222622).

Almost surely, 2^{1249288445243} is an apocalyptic number.

1249288445243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249288445243 is an equidigital number, since it uses as much as digits as its factorization.

1249288445243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17694720, while the sum is 56.

The spelling of 1249288445243 in words is "one trillion, two hundred forty-nine billion, two hundred eighty-eight million, four hundred forty-five thousand, two hundred forty-three".