1285129134 has 24 divisors (see below), whose sum is σ = 2785400280. Its totient is φ = 428229648.

The previous prime is 1285129123. The next prime is 1285129159. The reversal of 1285129134 is 4319215821.

1285129134 is a `hidden beast` number, since 1 + 2 + 8 + 512 + 9 + 134 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50469 + ... + 71535.

It is an arithmetic number, because the mean of its divisors is an integer number (116058345).

Almost surely, 2^1285129134 is an apocalyptic number.

1285129134 is an abundant number, since it is smaller than the sum of its proper divisors (1500271146).

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

1285129134 is a wasteful number, since it uses less digits than its factorization.

1285129134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24464 (or 24461 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 1285129134 is about 35848.6978006175. The cubic root of 1285129134 is about 1087.2153858440.

The spelling of 1285129134 in words is "one billion, two hundred eighty-five million, one hundred twenty-nine thousand, one hundred thirty-four".