1276375128 has 48 divisors (see below), whose sum is σ = 3711910680. Its totient is φ = 364678272.

The previous prime is 1276375127. The next prime is 1276375129. The reversal of 1276375128 is 8215736721.

It is an interprime number because it is at equal distance from previous prime (1276375127) and next prime (1276375129).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1276375128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276375127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 541501 + ... + 543852.

Almost surely, 2^1276375128 is an apocalyptic number.

It is an amenable number.

1276375128 is an abundant number, since it is smaller than the sum of its proper divisors (2435535552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1276375128 is a wasteful number, since it uses less digits than its factorization.

1276375128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085376 (or 1085365 counting only the distinct ones).

The product of its digits is 141120, while the sum is 42.

The square root of 1276375128 is about 35726.3925970703. The cubic root of 1276375128 is about 1084.7411383839.

The spelling of 1276375128 in words is "one billion, two hundred seventy-six million, three hundred seventy-five thousand, one hundred twenty-eight".