1285286136 has 32 divisors (see below), whose sum is σ = 3215247360. Its totient is φ = 428157792.

The previous prime is 1285286117. The next prime is 1285286137. The reversal of 1285286136 is 6316825821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285286137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23811 + ... + 56013.

It is an arithmetic number, because the mean of its divisors is an integer number (100476480).

Almost surely, 2^1285286136 is an apocalyptic number.

It is an amenable number.

1285286136 is an abundant number, since it is smaller than the sum of its proper divisors (1929961224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285286136 is a wasteful number, since it uses less digits than its factorization.

1285286136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33875 (or 33871 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 1285286136 is about 35850.8875203948. The cubic root of 1285286136 is about 1087.2596584478.

The spelling of 1285286136 in words is "one billion, two hundred eighty-five million, two hundred eighty-six thousand, one hundred thirty-six".