1285761028171 has 4 divisors (see below), whose sum is σ = 1286502957792. Its totient is φ = 1285019098552.

The previous prime is 1285761028091. The next prime is 1285761028199. The reversal of 1285761028171 is 1718201675821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1285761028171 - 2⁷ = 1285761028043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285761068171) 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 3 ways as a sum of consecutive naturals, for example, 370962211 + ... + 370965676.

It is an arithmetic number, because the mean of its divisors is an integer number (321625739448).

Almost surely, 2^{1285761028171} is an apocalyptic number.

1285761028171 is a deficient number, since it is larger than the sum of its proper divisors (741929621).

1285761028171 is an equidigital number, since it uses as much as digits as its factorization.

1285761028171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741929620.

The product of its (nonzero) digits is 376320, while the sum is 49.

The spelling of 1285761028171 in words is "one trillion, two hundred eighty-five billion, seven hundred sixty-one million, twenty-eight thousand, one hundred seventy-one".