1265311 has 2 divisors, whose sum is σ = 1265312. Its totient is φ = 1265310.

The previous prime is 1265281. The next prime is 1265321. The reversal of 1265311 is 1135621.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1265311 - 2⁵ = 1265279 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265321) 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, 632655 + 632656.

It is an arithmetic number, because the mean of its divisors is an integer number (632656).

2^1265311 is an apocalyptic number.

1265311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265311 is an equidigital number, since it uses as much as digits as its factorization.

1265311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 180, while the sum is 19.

The square root of 1265311 is about 1124.8604357875. The cubic root of 1265311 is about 108.1597715247.

The spelling of 1265311 in words is "one million, two hundred sixty-five thousand, three hundred eleven".