12053550 has 48 divisors (see below), whose sum is σ = 30212352. Its totient is φ = 3180000.

The previous prime is 12053519. The next prime is 12053551. The reversal of 12053550 is 5535021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12053551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15675 + ... + 16425.

It is an arithmetic number, because the mean of its divisors is an integer number (629424).

Almost surely, 2^12053550 is an apocalyptic number.

12053550 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 12053550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15106176).

12053550 is an abundant number, since it is smaller than the sum of its proper divisors (18158802).

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

12053550 is a wasteful number, since it uses less digits than its factorization.

12053550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 12053550 is about 3471.8222880787. The cubic root of 12053550 is about 229.2828956782.

Adding to 12053550 its reverse (5535021), we get a palindrome (17588571).

The spelling of 12053550 in words is "twelve million, fifty-three thousand, five hundred fifty".