1285688 has 8 divisors (see below), whose sum is σ = 2410680. Its totient is φ = 642840.

The previous prime is 1285679. The next prime is 1285699. The reversal of 1285688 is 8865821.

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80348 + ... + 80363.

It is an arithmetic number, because the mean of its divisors is an integer number (301335).

2^1285688 is an apocalyptic number.

It is an amenable number.

1285688 is a deficient number, since it is larger than the sum of its proper divisors (1124992).

1285688 is a wasteful number, since it uses less digits than its factorization.

1285688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160717 (or 160713 counting only the distinct ones).

The product of its digits is 30720, while the sum is 38.

The square root of 1285688 is about 1133.8818280579. The cubic root of 1285688 is about 108.7372962657.

The spelling of 1285688 in words is "one million, two hundred eighty-five thousand, six hundred eighty-eight".