12009550 has 24 divisors (see below), whose sum is σ = 25529616. Its totient is φ = 4117440.

The previous prime is 12009541. The next prime is 12009551. The reversal of 12009550 is 5590021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12009551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16807 + ... + 17506.

It is an arithmetic number, because the mean of its divisors is an integer number (1063734).

Almost surely, 2^12009550 is an apocalyptic number.

12009550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12009550 is an abundant number, since it is smaller than the sum of its proper divisors (13520066).

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

12009550 is a wasteful number, since it uses less digits than its factorization.

12009550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34332 (or 34327 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 12009550 is about 3465.4797647656. The cubic root of 12009550 is about 229.0035658566.

Adding to 12009550 its reverse (5590021), we get a palindrome (17599571).

The spelling of 12009550 in words is "twelve million, nine thousand, five hundred fifty".