1212766001 has 2 divisors, whose sum is σ = 1212766002. Its totient is φ = 1212766000.

The previous prime is 1212765979. The next prime is 1212766003. The reversal of 1212766001 is 1006672121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1210970401 + 1795600 = 34799^2 + 1340^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212766001 - 2¹⁰ = 1212764977 is a prime.

Together with 1212766003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1212766003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606383000 + 606383001.

It is an arithmetic number, because the mean of its divisors is an integer number (606383001).

Almost surely, 2^1212766001 is an apocalyptic number.

It is an amenable number.

1212766001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212766001 is an equidigital number, since it uses as much as digits as its factorization.

1212766001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1212766001 is about 34824.7900352608. The cubic root of 1212766001 is about 1066.4135904267.

The spelling of 1212766001 in words is "one billion, two hundred twelve million, seven hundred sixty-six thousand, one".