1265777 has 2 divisors, whose sum is σ = 1265778. Its totient is φ = 1265776.

The previous prime is 1265741. The next prime is 1265779. The reversal of 1265777 is 7775621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1263376 + 2401 = 1124^2 + 49^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265777 - 2⁸ = 1265521 is a prime.

Together with 1265779, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1265779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632888 + 632889.

It is an arithmetic number, because the mean of its divisors is an integer number (632889).

2^1265777 is an apocalyptic number.

It is an amenable number.

1265777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265777 is an equidigital number, since it uses as much as digits as its factorization.

1265777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20580, while the sum is 35.

The square root of 1265777 is about 1125.0675535273. The cubic root of 1265777 is about 108.1730479095.

The spelling of 1265777 in words is "one million, two hundred sixty-five thousand, seven hundred seventy-seven".