12021530 has 8 divisors (see below), whose sum is σ = 21638772. Its totient is φ = 4808608.

The previous prime is 12021491. The next prime is 12021539. The reversal of 12021530 is 3512021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11854249 + 167281 = 3443^2 + 409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (12021539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601067 + ... + 601086.

Almost surely, 2^12021530 is an apocalyptic number.

12021530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12021530 is a deficient number, since it is larger than the sum of its proper divisors (9617242).

12021530 is a wasteful number, since it uses less digits than its factorization.

12021530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1202160.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 12021530 is about 3467.2078103281. The cubic root of 12021530 is about 229.0796872486.

Adding to 12021530 its reverse (3512021), we get a palindrome (15533551).

The spelling of 12021530 in words is "twelve million, twenty-one thousand, five hundred thirty".