12071530 has 24 divisors (see below), whose sum is σ = 23087628. Its totient is φ = 4543488.

The previous prime is 12071503. The next prime is 12071531. The reversal of 12071530 is 3517021.

It can be written as a sum of positive squares in 6 ways, for example, as 10962721 + 1108809 = 3311^2 + 1053^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12071498 and 12071507.

It is not an unprimeable number, because it can be changed into a prime (12071531) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 802 + ... + 4978.

Almost surely, 2^12071530 is an apocalyptic number.

12071530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12071530 is a deficient number, since it is larger than the sum of its proper divisors (11016098).

12071530 is a wasteful number, since it uses less digits than its factorization.

12071530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4218 (or 4201 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 19.

The square root of 12071530 is about 3474.4107414064. The cubic root of 12071530 is about 229.3968443584.

Adding to 12071530 its reverse (3517021), we get a palindrome (15588551).

The spelling of 12071530 in words is "twelve million, seventy-one thousand, five hundred thirty".