1275211742089 has 4 divisors (see below), whose sum is σ = 1350224197524. Its totient is φ = 1200199286656.

The previous prime is 1275211742087. The next prime is 1275211742099. The reversal of 1275211742089 is 9802471125721.

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 874374606400 + 400837135689 = 935080^2 + 633117^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275211742089 - 2¹ = 1275211742087 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275211742083) 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, 37506227692 + ... + 37506227725.

It is an arithmetic number, because the mean of its divisors is an integer number (337556049381).

Almost surely, 2^{1275211742089} is an apocalyptic number.

It is an amenable number.

1275211742089 is a deficient number, since it is larger than the sum of its proper divisors (75012455435).

1275211742089 is an equidigital number, since it uses as much as digits as its factorization.

1275211742089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75012455434.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 1275211742089 in words is "one trillion, two hundred seventy-five billion, two hundred eleven million, seven hundred forty-two thousand, eighty-nine".