1263394226 has 16 divisors (see below), whose sum is σ = 1903891200. Its totient is φ = 628771248.

The previous prime is 1263394207. The next prime is 1263394333. The reversal of 1263394226 is 6224933621.

It is a self number, because there is not a number n which added to its sum of digits gives 1263394226.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463295 + ... + 466013.

It is an arithmetic number, because the mean of its divisors is an integer number (118993200).

Almost surely, 2^1263394226 is an apocalyptic number.

1263394226 is a deficient number, since it is larger than the sum of its proper divisors (640496974).

1263394226 is a wasteful number, since it uses less digits than its factorization.

1263394226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3713.

The product of its digits is 93312, while the sum is 38.

The square root of 1263394226 is about 35544.2572858120. The cubic root of 1263394226 is about 1081.0512814397.

The spelling of 1263394226 in words is "one billion, two hundred sixty-three million, three hundred ninety-four thousand, two hundred twenty-six".