1263279404 has 12 divisors (see below), whose sum is σ = 2214088128. Its totient is φ = 630682800.

The previous prime is 1263279383. The next prime is 1263279427. The reversal of 1263279404 is 4049723621.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236252 + ... + 241539.

It is an arithmetic number, because the mean of its divisors is an integer number (184507344).

Almost surely, 2^1263279404 is an apocalyptic number.

It is an amenable number.

1263279404 is a deficient number, since it is larger than the sum of its proper divisors (950808724).

1263279404 is a wasteful number, since it uses less digits than its factorization.

1263279404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478456 (or 478454 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 1263279404 is about 35542.6420514851. The cubic root of 1263279404 is about 1081.0185304508.

The spelling of 1263279404 in words is "one billion, two hundred sixty-three million, two hundred seventy-nine thousand, four hundred four".