1263168426 has 32 divisors (see below), whose sum is σ = 2787035328. Its totient is φ = 379186560.

The previous prime is 1263168407. The next prime is 1263168427. The reversal of 1263168426 is 6248613621.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1263168427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194296 + ... + 200691.

It is an arithmetic number, because the mean of its divisors is an integer number (87094854).

Almost surely, 2^1263168426 is an apocalyptic number.

1263168426 is an abundant number, since it is smaller than the sum of its proper divisors (1523866902).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1263168426 is a wasteful number, since it uses less digits than its factorization.

1263168426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395046.

The product of its digits is 82944, while the sum is 39.

The square root of 1263168426 is about 35541.0808220572. The cubic root of 1263168426 is about 1080.9868740104.

The spelling of 1263168426 in words is "one billion, two hundred sixty-three million, one hundred sixty-eight thousand, four hundred twenty-six".