1243902475625 has 10 divisors (see below), whose sum is σ = 1554380534322. Its totient is φ = 995121980000.

The previous prime is 1243902475609. The next prime is 1243902475633. The reversal of 1243902475625 is 5265742093421.

It can be written as a sum of positive squares in 5 ways, for example, as 245965410601 + 997937065024 = 495949^2 + 998968^2 .

It is not a de Polignac number, because 1243902475625 - 2⁴ = 1243902475609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 995121356 + ... + 995122605.

Almost surely, 2^{1243902475625} is an apocalyptic number.

It is an amenable number.

1243902475625 is a deficient number, since it is larger than the sum of its proper divisors (310478058697).

1243902475625 is an frugal number, since it uses more digits than its factorization.

1243902475625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990243981 (or 1990243966 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 50.

The spelling of 1243902475625 in words is "one trillion, two hundred forty-three billion, nine hundred two million, four hundred seventy-five thousand, six hundred twenty-five".