1249750650 has 96 divisors (see below), whose sum is σ = 3375230400. Its totient is φ = 304819200.

The previous prime is 1249750571. The next prime is 1249750661. The reversal of 1249750650 is 560579421.

It is a junction number, because it is equal to n+sod(n) for n = 1249750599 and 1249750608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75090 + ... + 90210.

It is an arithmetic number, because the mean of its divisors is an integer number (35158650).

Almost surely, 2^1249750650 is an apocalyptic number.

1249750650 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 1249750650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1687615200).

1249750650 is an abundant number, since it is smaller than the sum of its proper divisors (2125479750).

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

1249750650 is a wasteful number, since it uses less digits than its factorization.

1249750650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15184 (or 15179 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 39.

The square root of 1249750650 is about 35351.8125419334. The cubic root of 1249750650 is about 1077.1457124807.

The spelling of 1249750650 in words is "one billion, two hundred forty-nine million, seven hundred fifty thousand, six hundred fifty".