1275038438975 has 144 divisors (see below), whose sum is σ = 1927620624384. Its totient is φ = 819076147200.

The previous prime is 1275038438957. The next prime is 1275038438981. The reversal of 1275038438975 is 5798348305721.

It is a Cunningham number, because it is equal to 1129176²-1.

It is not a de Polignac number, because 1275038438975 - 2¹⁸ = 1275038176831 is a prime.

It is a congruent 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 143 ways as a sum of consecutive naturals, for example, 766708994 + ... + 766710656.

It is an arithmetic number, because the mean of its divisors is an integer number (13386254336).

Almost surely, 2^{1275038438975} is an apocalyptic number.

1275038438975 is a deficient number, since it is larger than the sum of its proper divisors (652582185409).

1275038438975 is a wasteful number, since it uses less digits than its factorization.

1275038438975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886 (or 1850 counting only the distinct ones).

The product of its (nonzero) digits is 50803200, while the sum is 62.

The spelling of 1275038438975 in words is "one trillion, two hundred seventy-five billion, thirty-eight million, four hundred thirty-eight thousand, nine hundred seventy-five".