1266913 has 2 divisors, whose sum is σ = 1266914. Its totient is φ = 1266912.

The previous prime is 1266899. The next prime is 1266919. The reversal of 1266913 is 3196621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1203409 + 63504 = 1097^2 + 252^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1266913 is a prime.

1266913 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1266919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633456 + 633457.

It is an arithmetic number, because the mean of its divisors is an integer number (633457).

2^1266913 is an apocalyptic number.

It is an amenable number.

1266913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266913 is an equidigital number, since it uses as much as digits as its factorization.

1266913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 28.

The square root of 1266913 is about 1125.5722988773. The cubic root of 1266913 is about 108.2053990106.

The spelling of 1266913 in words is "one million, two hundred sixty-six thousand, nine hundred thirteen".