12149550 has 216 divisors, whose sum is σ = 41347800. Its totient is φ = 2540160.

The previous prime is 12149539. The next prime is 12149563. The reversal of 12149550 is 5594121.

12149550 is a `hidden beast` number, since 121 + 495 + 50 = 666.

It is a super-2 number, since 2×12149550² = 295223130405000, 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 107 ways as a sum of consecutive naturals, for example, 418936 + ... + 418964.

It is an arithmetic number, because the mean of its divisors is an integer number (191425).

Almost surely, 2^12149550 is an apocalyptic number.

12149550 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 12149550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20673900).

12149550 is an abundant number, since it is smaller than the sum of its proper divisors (29198250).

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

12149550 is a wasteful number, since it uses less digits than its factorization.

12149550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 65 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 12149550 is about 3485.6204612665. The cubic root of 12149550 is about 229.8899914999.

The spelling of 12149550 in words is "twelve million, one hundred forty-nine thousand, five hundred fifty".