1266560213 has 2 divisors, whose sum is σ = 1266560214. Its totient is φ = 1266560212.

The previous prime is 1266560201. The next prime is 1266560221. The reversal of 1266560213 is 3120656621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 851297329 + 415262884 = 29177^2 + 20378^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266560213 - 2¹⁸ = 1266298069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1266560213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1266568213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633280106 + 633280107.

It is an arithmetic number, because the mean of its divisors is an integer number (633280107).

Almost surely, 2^1266560213 is an apocalyptic number.

It is an amenable number.

1266560213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266560213 is an equidigital number, since it uses as much as digits as its factorization.

1266560213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 1266560213 is about 35588.7652637739. The cubic root of 1266560213 is about 1081.9535438454.

The spelling of 1266560213 in words is "one billion, two hundred sixty-six million, five hundred sixty thousand, two hundred thirteen".