1266205411 has 2 divisors, whose sum is σ = 1266205412. Its totient is φ = 1266205410.

The previous prime is 1266205363. The next prime is 1266205433. The reversal of 1266205411 is 1145026621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1266205411 - 2²⁷ = 1131987683 is a prime.

It is a super-2 number, since 2×1266205411² = 3206552285691357842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1266205411.

It is not a weakly prime, because it can be changed into another prime (1266205111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633102705 + 633102706.

It is an arithmetic number, because the mean of its divisors is an integer number (633102706).

Almost surely, 2^1266205411 is an apocalyptic number.

1266205411 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266205411 is an equidigital number, since it uses as much as digits as its factorization.

1266205411 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1266205411 is about 35583.7801673740. The cubic root of 1266205411 is about 1081.8525050559.

The spelling of 1266205411 in words is "one billion, two hundred sixty-six million, two hundred five thousand, four hundred eleven".