12399750 has 128 divisors (see below), whose sum is σ = 37739520. Its totient is φ = 2988000.

The previous prime is 12399727. The next prime is 12399763. The reversal of 12399750 is 5799321.

12399750 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74167 + ... + 74333.

It is an arithmetic number, because the mean of its divisors is an integer number (294840).

Almost surely, 2^12399750 is an apocalyptic number.

12399750 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 12399750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18869760).

12399750 is an abundant number, since it is smaller than the sum of its proper divisors (25339770).

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

12399750 is a wasteful number, since it uses less digits than its factorization.

12399750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 188 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 12399750 is about 3521.3278745382. The cubic root of 12399750 is about 231.4573499387.

The spelling of 12399750 in words is "twelve million, three hundred ninety-nine thousand, seven hundred fifty".