1275434544123 has 40 divisors (see below), whose sum is σ = 2017860075792. Its totient is φ = 800071893504.

The previous prime is 1275434544077. The next prime is 1275434544199. The reversal of 1275434544123 is 3214454345721.

1275434544123 is a `hidden beast` number, since 1 + 2 + 7 + 54 + 34 + 544 + 1 + 23 = 666.

It is not a de Polignac number, because 1275434544123 - 2²² = 1275430349819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1275434544623) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 5472336 + ... + 5700642.

Almost surely, 2^{1275434544123} is an apocalyptic number.

1275434544123 is a deficient number, since it is larger than the sum of its proper divisors (742425531669).

1275434544123 is a wasteful number, since it uses less digits than its factorization.

1275434544123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232393 (or 232384 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 45.

Adding to 1275434544123 its reverse (3214454345721), we get a palindrome (4489888889844).

The spelling of 1275434544123 in words is "one trillion, two hundred seventy-five billion, four hundred thirty-four million, five hundred forty-four thousand, one hundred twenty-three".