12127530 has 16 divisors (see below), whose sum is σ = 29106144. Its totient is φ = 3234000.

The previous prime is 12127519. The next prime is 12127553. The reversal of 12127530 is 3572121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12127497 and 12127506.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 202096 + ... + 202155.

It is an arithmetic number, because the mean of its divisors is an integer number (1819134).

Almost surely, 2^12127530 is an apocalyptic number.

12127530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12127530 is an abundant number, since it is smaller than the sum of its proper divisors (16978614).

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

12127530 is a wasteful number, since it uses less digits than its factorization.

12127530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404261.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 12127530 is about 3482.4603371754. The cubic root of 12127530 is about 229.7510223214.

Adding to 12127530 its reverse (3572121), we get a palindrome (15699651).

The spelling of 12127530 in words is "twelve million, one hundred twenty-seven thousand, five hundred thirty".