1275842399 has 8 divisors (see below), whose sum is σ = 1411119360. Its totient is φ = 1145870496.

The previous prime is 1275842363. The next prime is 1275842411. The reversal of 1275842399 is 9932485721.

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

It is a cyclic number.

It is not a de Polignac number, because 1275842399 - 2¹⁶ = 1275776863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1275842339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1325759 + ... + 1326720.

It is an arithmetic number, because the mean of its divisors is an integer number (176389920).

Almost surely, 2^1275842399 is an apocalyptic number.

1275842399 is a deficient number, since it is larger than the sum of its proper divisors (135276961).

1275842399 is a wasteful number, since it uses less digits than its factorization.

1275842399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2652529.

The product of its digits is 1088640, while the sum is 50.

The square root of 1275842399 is about 35718.9361403724. The cubic root of 1275842399 is about 1084.5902022250.

The spelling of 1275842399 in words is "one billion, two hundred seventy-five million, eight hundred forty-two thousand, three hundred ninety-nine".