1296875000 has 80 divisors (see below), whose sum is σ = 3076171560. Its totient is φ = 512500000.

The previous prime is 1296874993. The next prime is 1296875011. The reversal of 1296875000 is 5786921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15624959 + ... + 15625041.

Almost surely, 2^1296875000 is an apocalyptic number.

1296875000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1296875000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1538085780).

1296875000 is an abundant number, since it is smaller than the sum of its proper divisors (1779296560).

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

1296875000 is an frugal number, since it uses more digits than its factorization.

1296875000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 1296875000 is about 36012.1507272198. The cubic root of 1296875000 is about 1090.5176678637.

The spelling of 1296875000 in words is "one billion, two hundred ninety-six million, eight hundred seventy-five thousand".