1275322308857 has 4 divisors (see below), whose sum is σ = 1276311699060. Its totient is φ = 1274332918656.

The previous prime is 1275322308811. The next prime is 1275322308901. The reversal of 1275322308857 is 7588032235721.

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 957924157696 + 317398151161 = 978736^2 + 563381^2 .

It is a cyclic number.

It is not a de Polignac number, because 1275322308857 - 2¹² = 1275322304761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1275322308799 and 1275322308808.

It is not an unprimeable number, because it can be changed into a prime (1275322308257) 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, 494693168 + ... + 494695745.

It is an arithmetic number, because the mean of its divisors is an integer number (319077924765).

Almost surely, 2^{1275322308857} is an apocalyptic number.

It is an amenable number.

1275322308857 is a deficient number, since it is larger than the sum of its proper divisors (989390203).

1275322308857 is an equidigital number, since it uses as much as digits as its factorization.

1275322308857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989390202.

The product of its (nonzero) digits is 5644800, while the sum is 53.

The spelling of 1275322308857 in words is "one trillion, two hundred seventy-five billion, three hundred twenty-two million, three hundred eight thousand, eight hundred fifty-seven".