1285136466 has 48 divisors (see below), whose sum is σ = 2686854144. Its totient is φ = 409490208.

The previous prime is 1285136453. The next prime is 1285136483. The reversal of 1285136466 is 6646315821.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 771951 + ... + 773613.

It is an arithmetic number, because the mean of its divisors is an integer number (55976128).

Almost surely, 2^1285136466 is an apocalyptic number.

1285136466 is an abundant number, since it is smaller than the sum of its proper divisors (1401717678).

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

1285136466 is a wasteful number, since it uses less digits than its factorization.

1285136466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1823 (or 1764 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 1285136466 is about 35848.8000636005. The cubic root of 1285136466 is about 1087.2174534567.

The spelling of 1285136466 in words is "one billion, two hundred eighty-five million, one hundred thirty-six thousand, four hundred sixty-six".