1265111 has 2 divisors, whose sum is σ = 1265112. Its totient is φ = 1265110.

The previous prime is 1265101. The next prime is 1265113. The reversal of 1265111 is 1115621.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265111 is a prime.

It is a Sophie Germain prime.

Together with 1265113, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1265111.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265113) 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, 632555 + 632556.

It is an arithmetic number, because the mean of its divisors is an integer number (632556).

2^1265111 is an apocalyptic number.

1265111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265111 is an equidigital number, since it uses as much as digits as its factorization.

1265111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60, while the sum is 17.

The square root of 1265111 is about 1124.7715323567. The cubic root of 1265111 is about 108.1540725058.

The spelling of 1265111 in words is "one million, two hundred sixty-five thousand, one hundred eleven".