1287380434 has 8 divisors (see below), whose sum is σ = 1931225328. Its totient is φ = 643638660.

The previous prime is 1287380401. The next prime is 1287380447. The reversal of 1287380434 is 4340837821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27249 + ... + 57595.

It is an arithmetic number, because the mean of its divisors is an integer number (241403166).

Almost surely, 2^1287380434 is an apocalyptic number.

1287380434 is a deficient number, since it is larger than the sum of its proper divisors (643844894).

1287380434 is a wasteful number, since it uses less digits than its factorization.

1287380434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51560.

The product of its (nonzero) digits is 129024, while the sum is 40.

The square root of 1287380434 is about 35880.0840857432. The cubic root of 1287380434 is about 1087.8498798292.

The spelling of 1287380434 in words is "one billion, two hundred eighty-seven million, three hundred eighty thousand, four hundred thirty-four".