1287087279 has 8 divisors (see below), whose sum is σ = 1732778112. Its totient is φ = 849727320.

The previous prime is 1287087239. The next prime is 1287087281. The reversal of 1287087279 is 9727807821.

It is a happy number.

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

It is not a de Polignac number, because 1287087279 - 2⁹ = 1287086767 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287087229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2082357 + ... + 2082974.

It is an arithmetic number, because the mean of its divisors is an integer number (216597264).

Almost surely, 2^1287087279 is an apocalyptic number.

1287087279 is a deficient number, since it is larger than the sum of its proper divisors (445690833).

1287087279 is a wasteful number, since it uses less digits than its factorization.

1287087279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4165437.

The product of its (nonzero) digits is 790272, while the sum is 51.

The square root of 1287087279 is about 35875.9986481213. The cubic root of 1287087279 is about 1087.7673005510.

The spelling of 1287087279 in words is "one billion, two hundred eighty-seven million, eighty-seven thousand, two hundred seventy-nine".