1263799 has 2 divisors, whose sum is σ = 1263800. Its totient is φ = 1263798.

The previous prime is 1263793. The next prime is 1263803. The reversal of 1263799 is 9973621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1263799 - 2⁵ = 1263767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631899 + 631900.

It is an arithmetic number, because the mean of its divisors is an integer number (631900).

2^1263799 is an apocalyptic number.

1263799 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263799 is an equidigital number, since it uses as much as digits as its factorization.

1263799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 37.

The square root of 1263799 is about 1124.1881515120. The cubic root of 1263799 is about 108.1166720395.

The spelling of 1263799 in words is "one million, two hundred sixty-three thousand, seven hundred ninety-nine".