1248305040889 has 4 divisors (see below), whose sum is σ = 1251270136420. Its totient is φ = 1245339945360.

The previous prime is 1248305040883. The next prime is 1248305040893. The reversal of 1248305040889 is 9880405038421.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 125817765264 + 1122487275625 = 354708^2 + 1059475^2 .

It is a cyclic number.

It is not a de Polignac number, because 1248305040889 - 2³ = 1248305040881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1248305040881) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1482547134 + ... + 1482547975.

It is an arithmetic number, because the mean of its divisors is an integer number (312817534105).

Almost surely, 2^{1248305040889} is an apocalyptic number.

It is an amenable number.

1248305040889 is a deficient number, since it is larger than the sum of its proper divisors (2965095531).

1248305040889 is an equidigital number, since it uses as much as digits as its factorization.

1248305040889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2965095530.

The product of its (nonzero) digits is 2211840, while the sum is 52.

The spelling of 1248305040889 in words is "one trillion, two hundred forty-eight billion, three hundred five million, forty thousand, eight hundred eighty-nine".