12001571 has 2 divisors, whose sum is σ = 12001572. Its totient is φ = 12001570.

The previous prime is 12001553. The next prime is 12001667. The reversal of 12001571 is 17510021.

It is a weak prime.

It is an emirp because it is prime and its reverse (17510021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001571 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12001511) 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 as a sum of consecutive naturals, namely, 6000785 + 6000786.

It is an arithmetic number, because the mean of its divisors is an integer number (6000786).

Almost surely, 2^12001571 is an apocalyptic number.

12001571 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001571 is an equidigital number, since it uses as much as digits as its factorization.

12001571 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 70, while the sum is 17.

The square root of 12001571 is about 3464.3283620350. The cubic root of 12001571 is about 228.9528388862.

Adding to 12001571 its reverse (17510021), we get a palindrome (29511592).

The spelling of 12001571 in words is "twelve million, one thousand, five hundred seventy-one".