1285169711247 has 12 divisors (see below), whose sum is σ = 1856422778080. Its totient is φ = 856749102048.

The previous prime is 1285169711239. The next prime is 1285169711251. The reversal of 1285169711247 is 7421179615821.

1285169711247 is a `hidden beast` number, since 1 + 2 + 8 + 516 + 9 + 7 + 112 + 4 + 7 = 666.

It is not a de Polignac number, because 1285169711247 - 2³ = 1285169711239 is a prime.

It is a super-2 number, since 2×1285169711247² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1285169711193 and 1285169711202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285169711237) 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 11 ways as a sum of consecutive naturals, for example, 2292247 + ... + 2797272.

Almost surely, 2^{1285169711247} is an apocalyptic number.

1285169711247 is a deficient number, since it is larger than the sum of its proper divisors (571253066833).

1285169711247 is a wasteful number, since it uses less digits than its factorization.

1285169711247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5117582 (or 5117579 counting only the distinct ones).

The product of its digits is 1693440, while the sum is 54.

The spelling of 1285169711247 in words is "one trillion, two hundred eighty-five billion, one hundred sixty-nine million, seven hundred eleven thousand, two hundred forty-seven".