12667001 has 2 divisors, whose sum is σ = 12667002. Its totient is φ = 12667000.

The previous prime is 12666967. The next prime is 12667013. The reversal of 12667001 is 10076621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7284601 + 5382400 = 2699^2 + 2320^2 .

It is an emirp because it is prime and its reverse (10076621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12667001 is a prime.

It is not a weakly prime, because it can be changed into another prime (12667021) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6333500 + 6333501.

It is an arithmetic number, because the mean of its divisors is an integer number (6333501).

Almost surely, 2^12667001 is an apocalyptic number.

It is an amenable number.

12667001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12667001 is an equidigital number, since it uses as much as digits as its factorization.

12667001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 12667001 is about 3559.0730534790. The cubic root of 12667001 is about 233.1084061483.

The spelling of 12667001 in words is "twelve million, six hundred sixty-seven thousand, one".