1385931 has 4 divisors (see below), whose sum is σ = 1847912. Its totient is φ = 923952.

The previous prime is 1385929. The next prime is 1385947. The reversal of 1385931 is 1395831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1395831 = 3 ⋅465277.

It is not a de Polignac number, because 1385931 - 2¹ = 1385929 is a prime.

It is a super-2 number, since 2×1385931² = 3841609473522, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1385921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230986 + ... + 230991.

It is an arithmetic number, because the mean of its divisors is an integer number (461978).

2^1385931 is an apocalyptic number.

1385931 is a deficient number, since it is larger than the sum of its proper divisors (461981).

1385931 is an equidigital number, since it uses as much as digits as its factorization.

1385931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461980.

The product of its digits is 3240, while the sum is 30.

The square root of 1385931 is about 1177.2557071427. The cubic root of 1385931 is about 111.4928977224.

The spelling of 1385931 in words is "one million, three hundred eighty-five thousand, nine hundred thirty-one".