1263949286 has 16 divisors (see below), whose sum is σ = 2050163136. Its totient is φ = 582143616.

The previous prime is 1263949243. The next prime is 1263949289. The reversal of 1263949286 is 6829493621.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263949289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393881 + ... + 397076.

It is an arithmetic number, because the mean of its divisors is an integer number (128135196).

Almost surely, 2^1263949286 is an apocalyptic number.

1263949286 is a deficient number, since it is larger than the sum of its proper divisors (786213850).

1263949286 is a wasteful number, since it uses less digits than its factorization.

1263949286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 791023.

The product of its digits is 1119744, while the sum is 50.

The square root of 1263949286 is about 35552.0644407607. The cubic root of 1263949286 is about 1081.2095747257.

The spelling of 1263949286 in words is "one billion, two hundred sixty-three million, nine hundred forty-nine thousand, two hundred eighty-six".