12015001 has 2 divisors, whose sum is σ = 12015002. Its totient is φ = 12015000.

The previous prime is 12014999. The next prime is 12015013. The reversal of 12015001 is 10051021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6255001 + 5760000 = 2501^2 + 2400^2 .

It is an emirp because it is prime and its reverse (10051021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12015001 - 2¹ = 12014999 is a prime.

Together with 12014999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (12015041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6007500 + 6007501.

It is an arithmetic number, because the mean of its divisors is an integer number (6007501).

Almost surely, 2^12015001 is an apocalyptic number.

It is an amenable number.

12015001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12015001 is an equidigital number, since it uses as much as digits as its factorization.

12015001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10, while the sum is 10.

The square root of 12015001 is about 3466.2661467348. The cubic root of 12015001 is about 229.0382079990.

Adding to 12015001 its reverse (10051021), we get a palindrome (22066022).

The spelling of 12015001 in words is "twelve million, fifteen thousand, one".