12055550 has 48 divisors (see below), whose sum is σ = 25592112. Its totient is φ = 4185600.

The previous prime is 12055531. The next prime is 12055553. The reversal of 12055550 is 5555021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12055553) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 10505 + ... + 11595.

It is an arithmetic number, because the mean of its divisors is an integer number (533169).

Almost surely, 2^12055550 is an apocalyptic number.

12055550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12055550 is an abundant number, since it is smaller than the sum of its proper divisors (13536562).

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

12055550 is a wasteful number, since it uses less digits than its factorization.

12055550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133 (or 1128 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 12055550 is about 3472.1103093076. The cubic root of 12055550 is about 229.2955763250.

The spelling of 12055550 in words is "twelve million, fifty-five thousand, five hundred fifty".