1275967999 has 8 divisors (see below), whose sum is σ = 1283104512. Its totient is φ = 1268849880.

The previous prime is 1275967981. The next prime is 1275968003. The reversal of 1275967999 is 9997695721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1275967999 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1275967999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275967919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148392 + ... + 156754.

It is an arithmetic number, because the mean of its divisors is an integer number (160388064).

Almost surely, 2^1275967999 is an apocalyptic number.

1275967999 is a deficient number, since it is larger than the sum of its proper divisors (7136513).

1275967999 is an equidigital number, since it uses as much as digits as its factorization.

1275967999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9197.

The product of its digits is 19289340, while the sum is 64.

The square root of 1275967999 is about 35720.6942681690. The cubic root of 1275967999 is about 1084.6257917982.

The spelling of 1275967999 in words is "one billion, two hundred seventy-five million, nine hundred sixty-seven thousand, nine hundred ninety-nine".