1263258996 has 24 divisors (see below), whose sum is σ = 2948406720. Its totient is φ = 420971712.

The previous prime is 1263258977. The next prime is 1263259003. The reversal of 1263258996 is 6998523621.

It is a congruent number.

It is an unprimeable number.

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, 39760 + ... + 64088.

It is an arithmetic number, because the mean of its divisors is an integer number (122850280).

Almost surely, 2^1263258996 is an apocalyptic number.

It is an amenable number.

1263258996 is an abundant number, since it is smaller than the sum of its proper divisors (1685147724).

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

1263258996 is a wasteful number, since it uses less digits than its factorization.

1263258996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28663 (or 28661 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 51.

The square root of 1263258996 is about 35542.3549585561. The cubic root of 1263258996 is about 1081.0127092142.

The spelling of 1263258996 in words is "one billion, two hundred sixty-three million, two hundred fifty-eight thousand, nine hundred ninety-six".