1382857 has 4 divisors (see below), whose sum is σ = 1580416. Its totient is φ = 1185300.

The previous prime is 1382827. The next prime is 1382861. The reversal of 1382857 is 7582831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7582831 = 443 ⋅17117.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1382857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1382827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98769 + ... + 98782.

It is an arithmetic number, because the mean of its divisors is an integer number (395104).

2^1382857 is an apocalyptic number.

It is an amenable number.

1382857 is a deficient number, since it is larger than the sum of its proper divisors (197559).

1382857 is an equidigital number, since it uses as much as digits as its factorization.

1382857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197558.

The product of its digits is 13440, while the sum is 34.

The square root of 1382857 is about 1175.9494036735. The cubic root of 1382857 is about 111.4104061525.

The spelling of 1382857 in words is "one million, three hundred eighty-two thousand, eight hundred fifty-seven".