12250784 has 72 divisors (see below), whose sum is σ = 30264948. Its totient is φ = 4838400.

The previous prime is 12250769. The next prime is 12250831. The reversal of 12250784 is 48705221.

It can be written as a sum of positive squares in 2 ways, for example, as 12250000 + 784 = 3500^2 + 28^2 .

It is a super-2 number, since 2×12250784² = 300163417229312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20084 + ... + 20684.

Almost surely, 2^12250784 is an apocalyptic number.

12250784 is a gapful number since it is divisible by the number (14) 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 12250784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15132474).

12250784 is an abundant number, since it is smaller than the sum of its proper divisors (18014164).

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

12250784 is a wasteful number, since it uses less digits than its factorization.

12250784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 12250784 is about 3500.1119982081. Note that the first 3 decimals coincide. The cubic root of 12250784 is about 230.5267322967.

The spelling of 12250784 in words is "twelve million, two hundred fifty thousand, seven hundred eighty-four".