1296385900 has 36 divisors (see below), whose sum is σ = 2903911360. Its totient is φ = 501825600.

The previous prime is 1296385889. The next prime is 1296385919. The reversal of 1296385900 is 95836921.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205995 + ... + 212194.

Almost surely, 2^1296385900 is an apocalyptic number.

1296385900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1296385900 is an abundant number, since it is smaller than the sum of its proper divisors (1607525460).

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

1296385900 is a wasteful number, since it uses less digits than its factorization.

1296385900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418234 (or 418227 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 1296385900 is about 36005.3593233007. The cubic root of 1296385900 is about 1090.3805589784.

The spelling of 1296385900 in words is "one billion, two hundred ninety-six million, three hundred eighty-five thousand, nine hundred".