1263821496 has 32 divisors (see below), whose sum is σ = 3610919040. Its totient is φ = 361091808.

The previous prime is 1263821473. The next prime is 1263821501. The reversal of 1263821496 is 6941283621.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 3761206 + ... + 3761541.

It is an arithmetic number, because the mean of its divisors is an integer number (112841220).

Almost surely, 2^1263821496 is an apocalyptic number.

It is an amenable number.

1263821496 is an abundant number, since it is smaller than the sum of its proper divisors (2347097544).

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

1263821496 is a wasteful number, since it uses less digits than its factorization.

1263821496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7522763 (or 7522759 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 1263821496 is about 35550.2671719918. The cubic root of 1263821496 is about 1081.1731353871.

The spelling of 1263821496 in words is "one billion, two hundred sixty-three million, eight hundred twenty-one thousand, four hundred ninety-six".