1384857 has 24 divisors (see below), whose sum is σ = 2140320. Its totient is φ = 894240.

The previous prime is 1384849. The next prime is 1384861. The reversal of 1384857 is 7584831.

It is not a de Polignac number, because 1384857 - 2³ = 1384849 is a prime.

1384857 is a lucky number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1384847) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9894 + ... + 10032.

It is an arithmetic number, because the mean of its divisors is an integer number (89180).

2^1384857 is an apocalyptic number.

It is an amenable number.

1384857 is a deficient number, since it is larger than the sum of its proper divisors (755463).

1384857 is an equidigital number, since it uses as much as digits as its factorization.

1384857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195 (or 183 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 1384857 is about 1176.7994731474. The cubic root of 1384857 is about 111.4640905364.

The spelling of 1384857 in words is "one million, three hundred eighty-four thousand, eight hundred fifty-seven".