1385009 has 2 divisors, whose sum is σ = 1385010. Its totient is φ = 1385008.

The previous prime is 1385003. The next prime is 1385017. The reversal of 1385009 is 9005831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1311025 + 73984 = 1145^2 + 272^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385009 - 2⁴ = 1384993 is a prime.

It is not a weakly prime, because it can be changed into another prime (1385003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692504 + 692505.

It is an arithmetic number, because the mean of its divisors is an integer number (692505).

2^1385009 is an apocalyptic number.

It is an amenable number.

1385009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385009 is an equidigital number, since it uses as much as digits as its factorization.

1385009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1385009 is about 1176.8640533214. The cubic root of 1385009 is about 111.4681684356.

The spelling of 1385009 in words is "one million, three hundred eighty-five thousand, nine".