12081530 has 16 divisors (see below), whose sum is σ = 22891680. Its totient is φ = 4578192.

The previous prime is 12081529. The next prime is 12081533. The reversal of 12081530 is 3518021.

It is not an unprimeable number, because it can be changed into a prime (12081533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31604 + ... + 31983.

It is an arithmetic number, because the mean of its divisors is an integer number (1430730).

Almost surely, 2^12081530 is an apocalyptic number.

12081530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12081530 is a deficient number, since it is larger than the sum of its proper divisors (10810150).

12081530 is a wasteful number, since it uses less digits than its factorization.

12081530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63613.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 12081530 is about 3475.8495364443. The cubic root of 12081530 is about 229.4601706393.

Adding to 12081530 its reverse (3518021), we get a palindrome (15599551).

The spelling of 12081530 in words is "twelve million, eighty-one thousand, five hundred thirty".