1385869 has 2 divisors, whose sum is σ = 1385870. Its totient is φ = 1385868.

The previous prime is 1385863. The next prime is 1385873. The reversal of 1385869 is 9685831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 980100 + 405769 = 990^2 + 637^2 .

It is an emirp because it is prime and its reverse (9685831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1385869 - 2³ = 1385861 is a prime.

It is a super-2 number, since 2×1385869² = 3841265770322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1385861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 692934 + 692935.

It is an arithmetic number, because the mean of its divisors is an integer number (692935).

2^1385869 is an apocalyptic number.

It is an amenable number.

1385869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1385869 is an equidigital number, since it uses as much as digits as its factorization.

1385869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 40.

The square root of 1385869 is about 1177.2293744211. The cubic root of 1385869 is about 111.4912351426.

The spelling of 1385869 in words is "one million, three hundred eighty-five thousand, eight hundred sixty-nine".