12072021 has 8 divisors (see below), whose sum is σ = 17334240. Its totient is φ = 7428912.

The previous prime is 12072019. The next prime is 12072031. The reversal of 12072021 is 12027021.

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

It is not a de Polignac number, because 12072021 - 2¹ = 12072019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12072001) 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 7 ways as a sum of consecutive naturals, for example, 154731 + ... + 154808.

It is an arithmetic number, because the mean of its divisors is an integer number (2166780).

Almost surely, 2^12072021 is an apocalyptic number.

It is an amenable number.

12072021 is a deficient number, since it is larger than the sum of its proper divisors (5262219).

12072021 is a wasteful number, since it uses less digits than its factorization.

12072021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309555.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 12072021 is about 3474.4814001517. The cubic root of 12072021 is about 229.3999544951.

Adding to 12072021 its reverse (12027021), we get a palindrome (24099042).

The spelling of 12072021 in words is "twelve million, seventy-two thousand, twenty-one".