1385857 has 8 divisors (see below), whose sum is σ = 1600992. Its totient is φ = 1185600.

The previous prime is 1385843. The next prime is 1385861. The reversal of 1385857 is 7585831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1385857 - 2¹⁵ = 1353089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1385827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3519 + ... + 3892.

It is an arithmetic number, because the mean of its divisors is an integer number (200124).

2^1385857 is an apocalyptic number.

1385857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1385857 is a deficient number, since it is larger than the sum of its proper divisors (215135).

1385857 is a wasteful number, since it uses less digits than its factorization.

1385857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7439.

The product of its digits is 33600, while the sum is 37.

The square root of 1385857 is about 1177.2242776973. The cubic root of 1385857 is about 111.4909133472.

It can be divided in two parts, 138 and 5857, that added together give a palindrome (5995).

The spelling of 1385857 in words is "one million, three hundred eighty-five thousand, eight hundred fifty-seven".