1287244799 has 4 divisors (see below), whose sum is σ = 1287370536. Its totient is φ = 1287119064.

The previous prime is 1287244781. The next prime is 1287244801. The reversal of 1287244799 is 9974427821.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1287244799 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1287244799.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287246799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46004 + ... + 68489.

It is an arithmetic number, because the mean of its divisors is an integer number (321842634).

Almost surely, 2^1287244799 is an apocalyptic number.

1287244799 is a deficient number, since it is larger than the sum of its proper divisors (125737).

1287244799 is a wasteful number, since it uses less digits than its factorization.

1287244799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125736.

The product of its digits is 2032128, while the sum is 53.

The square root of 1287244799 is about 35878.1939205418. The cubic root of 1287244799 is about 1087.8116741580.

The spelling of 1287244799 in words is "one billion, two hundred eighty-seven million, two hundred forty-four thousand, seven hundred ninety-nine".