1285286952491 has 8 divisors (see below), whose sum is σ = 1300037611968. Its totient is φ = 1270576000000.

The previous prime is 1285286952487. The next prime is 1285286952539. The reversal of 1285286952491 is 1942596825821.

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 1285286952491 - 2² = 1285286952487 is a prime.

It is a super-2 number, since 2×1285286952491² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1285286952991) 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 7 ways as a sum of consecutive naturals, for example, 9861635 + ... + 9991116.

It is an arithmetic number, because the mean of its divisors is an integer number (162504701496).

Almost surely, 2^{1285286952491} is an apocalyptic number.

1285286952491 is a deficient number, since it is larger than the sum of its proper divisors (14750659477).

1285286952491 is a wasteful number, since it uses less digits than its factorization.

1285286952491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19853493.

The product of its digits is 24883200, while the sum is 62.

The spelling of 1285286952491 in words is "one trillion, two hundred eighty-five billion, two hundred eighty-six million, nine hundred fifty-two thousand, four hundred ninety-one".