1263863 has 2 divisors, whose sum is σ = 1263864. Its totient is φ = 1263862.

The previous prime is 1263853. The next prime is 1263887. The reversal of 1263863 is 3683621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1263863 - 2⁶ = 1263799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631931 + 631932.

It is an arithmetic number, because the mean of its divisors is an integer number (631932).

2^1263863 is an apocalyptic number.

1263863 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263863 is an equidigital number, since it uses as much as digits as its factorization.

1263863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 29.

The square root of 1263863 is about 1124.2166161377. The cubic root of 1263863 is about 108.1184970529.

The spelling of 1263863 in words is "one million, two hundred sixty-three thousand, eight hundred sixty-three".