12135550 has 24 divisors (see below), whose sum is σ = 25797456. Its totient is φ = 4160640.

The previous prime is 12135521. The next prime is 12135551. The reversal of 12135550 is 5553121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12135551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16987 + ... + 17686.

It is an arithmetic number, because the mean of its divisors is an integer number (1074894).

Almost surely, 2^12135550 is an apocalyptic number.

12135550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12135550 is an abundant number, since it is smaller than the sum of its proper divisors (13661906).

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

12135550 is a wasteful number, since it uses less digits than its factorization.

12135550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34692 (or 34687 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 12135550 is about 3483.6116316260. The cubic root of 12135550 is about 229.8016563520.

Adding to 12135550 its reverse (5553121), we get a palindrome (17688671).

The spelling of 12135550 in words is "twelve million, one hundred thirty-five thousand, five hundred fifty".