1275013889 has 4 divisors (see below), whose sum is σ = 1350014724. Its totient is φ = 1200013056.

The previous prime is 1275013877. The next prime is 1275013891. The reversal of 1275013889 is 9883105721.

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 841000000 + 434013889 = 29000^2 + 20833^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1275013889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1275013189) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 37500392 + ... + 37500425.

It is an arithmetic number, because the mean of its divisors is an integer number (337503681).

Almost surely, 2^1275013889 is an apocalyptic number.

It is an amenable number.

1275013889 is a deficient number, since it is larger than the sum of its proper divisors (75000835).

1275013889 is an equidigital number, since it uses as much as digits as its factorization.

1275013889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75000834.

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 1275013889 is about 35707.3366270855. The cubic root of 1275013889 is about 1084.3553800114.

The spelling of 1275013889 in words is "one billion, two hundred seventy-five million, thirteen thousand, eight hundred eighty-nine".