1385777 has 2 divisors, whose sum is σ = 1385778. Its totient is φ = 1385776.

The previous prime is 1385767. The next prime is 1385779. The reversal of 1385777 is 7775831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1073296 + 312481 = 1036^2 + 559^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385777 - 2⁸ = 1385521 is a prime.

Together with 1385779, 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 1385777.

It is not a weakly prime, because it can be changed into another prime (1385779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692888 + 692889.

It is an arithmetic number, because the mean of its divisors is an integer number (692889).

2^1385777 is an apocalyptic number.

It is an amenable number.

1385777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385777 is an equidigital number, since it uses as much as digits as its factorization.

1385777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41160, while the sum is 38.

The square root of 1385777 is about 1177.1902989746. The cubic root of 1385777 is about 111.4887679973.

The spelling of 1385777 in words is "one million, three hundred eighty-five thousand, seven hundred seventy-seven".