1296251250 has 320 divisors, whose sum is σ = 4102686720. Its totient is φ = 266112000.

The previous prime is 1296251249. The next prime is 1296251261. The reversal of 1296251250 is 521526921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 11471194 + ... + 11471306.

It is an arithmetic number, because the mean of its divisors is an integer number (12820896).

Almost surely, 2^1296251250 is an apocalyptic number.

1296251250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1296251250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2051343360).

1296251250 is an abundant number, since it is smaller than the sum of its proper divisors (2806435470).

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

1296251250 is a wasteful number, since it uses less digits than its factorization.

1296251250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187 (or 172 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 1296251250 is about 36003.4894142221. The cubic root of 1296251250 is about 1090.3428066328.

The spelling of 1296251250 in words is "one billion, two hundred ninety-six million, two hundred fifty-one thousand, two hundred fifty".