12145530 has 16 divisors (see below), whose sum is σ = 29149344. Its totient is φ = 3238800.

The previous prime is 12145513. The next prime is 12145537. The reversal of 12145530 is 3554121.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 12145497 and 12145506.

It is not an unprimeable number, because it can be changed into a prime (12145537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 202396 + ... + 202455.

It is an arithmetic number, because the mean of its divisors is an integer number (1821834).

Almost surely, 2^12145530 is an apocalyptic number.

12145530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12145530 is an abundant number, since it is smaller than the sum of its proper divisors (17003814).

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

12145530 is a wasteful number, since it uses less digits than its factorization.

12145530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404861.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 12145530 is about 3485.0437586923. The cubic root of 12145530 is about 229.8646336414.

Adding to 12145530 its reverse (3554121), we get a palindrome (15699651).

It can be divided in two parts, 121455 and 30, that multiplied together give a triangular number (3643650 = T₂₆₉₉).

The spelling of 12145530 in words is "twelve million, one hundred forty-five thousand, five hundred thirty".