1287170470861 has 16 divisors (see below), whose sum is σ = 1434187358208. Its totient is φ = 1145158159600.

The previous prime is 1287170470793. The next prime is 1287170470877. The reversal of 1287170470861 is 1680740717821.

It is a cyclic number.

It is not a de Polignac number, because 1287170470861 - 2²⁷ = 1287036253133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1287170470799 and 1287170470808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287170473861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6175416 + ... + 6380446.

It is an arithmetic number, because the mean of its divisors is an integer number (89636709888).

Almost surely, 2^{1287170470861} is an apocalyptic number.

1287170470861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1287170470861 is a deficient number, since it is larger than the sum of its proper divisors (147016887347).

1287170470861 is a wasteful number, since it uses less digits than its factorization.

1287170470861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217232.

The product of its (nonzero) digits is 1053696, while the sum is 52.

The spelling of 1287170470861 in words is "one trillion, two hundred eighty-seven billion, one hundred seventy million, four hundred seventy thousand, eight hundred sixty-one".