1380817 has 2 divisors, whose sum is σ = 1380818. Its totient is φ = 1380816.

The previous prime is 1380811. The next prime is 1380853. The reversal of 1380817 is 7180831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1354896 + 25921 = 1164^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 1380817 - 2¹⁹ = 856529 is a prime.

It is not a weakly prime, because it can be changed into another prime (1380811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690408 + 690409.

It is an arithmetic number, because the mean of its divisors is an integer number (690409).

2^1380817 is an apocalyptic number.

It is an amenable number.

1380817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1380817 is an equidigital number, since it uses as much as digits as its factorization.

1380817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1380817 is about 1175.0816992873. The cubic root of 1380817 is about 111.3555947294.

It can be divided in two parts, 1380 and 817, that added together give a cube (2197 = 13³).

The spelling of 1380817 in words is "one million, three hundred eighty thousand, eight hundred seventeen".