1263423159 has 24 divisors (see below), whose sum is σ = 1872338832. Its totient is φ = 820471680.

The previous prime is 1263423149. The next prime is 1263423163. The reversal of 1263423159 is 9513243621.

1263423159 is a `hidden beast` number, since 1 + 2 + 634 + 2 + 3 + 15 + 9 = 666.

It is not a de Polignac number, because 1263423159 - 2⁹ = 1263422647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263423149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 277072 + ... + 281594.

It is an arithmetic number, because the mean of its divisors is an integer number (78014118).

Almost surely, 2^1263423159 is an apocalyptic number.

1263423159 is a deficient number, since it is larger than the sum of its proper divisors (608915673).

1263423159 is a wasteful number, since it uses less digits than its factorization.

1263423159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5327 (or 5324 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 1263423159 is about 35544.6642831241. The cubic root of 1263423159 is about 1081.0595337644.

The spelling of 1263423159 in words is "one billion, two hundred sixty-three million, four hundred twenty-three thousand, one hundred fifty-nine".