1260863999 has 2 divisors, whose sum is σ = 1260864000. Its totient is φ = 1260863998.

The previous prime is 1260863983. The next prime is 1260864029. The reversal of 1260863999 is 9993680621.

It is a weak prime.

It is an emirp because it is prime and its reverse (9993680621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1260863999 - 2⁴ = 1260863983 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1260863999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1260863299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630431999 + 630432000.

It is an arithmetic number, because the mean of its divisors is an integer number (630432000).

Almost surely, 2^1260863999 is an apocalyptic number.

1260863999 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260863999 is an equidigital number, since it uses as much as digits as its factorization.

1260863999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 1260863999 is about 35508.6468201761. The cubic root of 1260863999 is about 1080.3291175163.

The spelling of 1260863999 in words is "one billion, two hundred sixty million, eight hundred sixty-three thousand, nine hundred ninety-nine".