1287147119 has 4 divisors (see below), whose sum is σ = 1287834744. Its totient is φ = 1286459496.

The previous prime is 1287147097. The next prime is 1287147227. The reversal of 1287147119 is 9117417821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1287147119 - 2²⁸ = 1018711663 is a prime.

It is a super-2 number, since 2×1287147119² = 3313495411900000322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287149119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340997 + ... + 344750.

It is an arithmetic number, because the mean of its divisors is an integer number (321958686).

Almost surely, 2^1287147119 is an apocalyptic number.

1287147119 is a deficient number, since it is larger than the sum of its proper divisors (687625).

1287147119 is an equidigital number, since it uses as much as digits as its factorization.

1287147119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687624.

The product of its digits is 28224, while the sum is 41.

The square root of 1287147119 is about 35876.8326221811. The cubic root of 1287147119 is about 1087.7841579901.

The spelling of 1287147119 in words is "one billion, two hundred eighty-seven million, one hundred forty-seven thousand, one hundred nineteen".