1285681334 has 32 divisors (see below), whose sum is σ = 2267274240. Its totient is φ = 535364928.

The previous prime is 1285681333. The next prime is 1285681349. The reversal of 1285681334 is 4331865821.

It is a junction number, because it is equal to n+sod(n) for n = 1285681291 and 1285681300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285681333) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84434 + ... + 98490.

It is an arithmetic number, because the mean of its divisors is an integer number (70852320).

Almost surely, 2^1285681334 is an apocalyptic number.

1285681334 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1285681334 is a deficient number, since it is larger than the sum of its proper divisors (981592906).

1285681334 is a wasteful number, since it uses less digits than its factorization.

1285681334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14252.

The product of its digits is 138240, while the sum is 41.

The square root of 1285681334 is about 35856.3987873852. The cubic root of 1285681334 is about 1087.3710833927.

The spelling of 1285681334 in words is "one billion, two hundred eighty-five million, six hundred eighty-one thousand, three hundred thirty-four".