1287493834 has 16 divisors (see below), whose sum is σ = 2107919520. Its totient is φ = 584915760.

The previous prime is 1287493819. The next prime is 1287493843. The reversal of 1287493834 is 4383947821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30217 + ... + 59059.

It is an arithmetic number, because the mean of its divisors is an integer number (131744970).

Almost surely, 2^1287493834 is an apocalyptic number.

1287493834 is a deficient number, since it is larger than the sum of its proper divisors (820425686).

1287493834 is a wasteful number, since it uses less digits than its factorization.

1287493834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30885.

The product of its digits is 1161216, while the sum is 49.

The square root of 1287493834 is about 35881.6643148001. The cubic root of 1287493834 is about 1087.8818202852.

The spelling of 1287493834 in words is "one billion, two hundred eighty-seven million, four hundred ninety-three thousand, eight hundred thirty-four".