1265779 has 2 divisors, whose sum is σ = 1265780. Its totient is φ = 1265778.

The previous prime is 1265777. The next prime is 1265801. The reversal of 1265779 is 9775621.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1265779 - 2¹ = 1265777 is a prime.

Together with 1265777, it forms a pair of twin primes.

1265779 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1265777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632889 + 632890.

It is an arithmetic number, because the mean of its divisors is an integer number (632890).

2^1265779 is an apocalyptic number.

1265779 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265779 is an equidigital number, since it uses as much as digits as its factorization.

1265779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 37.

The square root of 1265779 is about 1125.0684423625. The cubic root of 1265779 is about 108.1731048827.

The spelling of 1265779 in words is "one million, two hundred sixty-five thousand, seven hundred seventy-nine".