1267660001 has 2 divisors, whose sum is σ = 1267660002. Its totient is φ = 1267660000.

The previous prime is 1267659941. The next prime is 1267660021. The reversal of 1267660001 is 1000667621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1211109601 + 56550400 = 34801^2 + 7520^2 .

It is an emirp because it is prime and its reverse (1000667621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1267660001 - 2³⁰ = 193918177 is a prime.

It is not a weakly prime, because it can be changed into another prime (1267660021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633830000 + 633830001.

It is an arithmetic number, because the mean of its divisors is an integer number (633830001).

Almost surely, 2^1267660001 is an apocalyptic number.

It is an amenable number.

1267660001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1267660001 is an equidigital number, since it uses as much as digits as its factorization.

1267660001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1267660001 is about 35604.2132478728. The cubic root of 1267660001 is about 1082.2666162823.

The spelling of 1267660001 in words is "one billion, two hundred sixty-seven million, six hundred sixty thousand, one".