1275138750025 has 24 divisors (see below), whose sum is σ = 1869365977920. Its totient is φ = 844229789760.

The previous prime is 1275138749987. The next prime is 1275138750079. The reversal of 1275138750025 is 5200578315721.

It is not a de Polignac number, because 1275138750025 - 2³¹ = 1272991266377 is a prime.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 125624359 + ... + 125634508.

It is an arithmetic number, because the mean of its divisors is an integer number (77890249080).

Almost surely, 2^{1275138750025} is an apocalyptic number.

It is an amenable number.

1275138750025 is a deficient number, since it is larger than the sum of its proper divisors (594227227895).

1275138750025 is a wasteful number, since it uses less digits than its factorization.

1275138750025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251258913 (or 251258908 counting only the distinct ones).

The product of its (nonzero) digits is 588000, while the sum is 46.

The spelling of 1275138750025 in words is "one trillion, two hundred seventy-five billion, one hundred thirty-eight million, seven hundred fifty thousand, twenty-five".