857047 has 2 divisors, whose sum is σ = 857048. Its totient is φ = 857046.

The previous prime is 857039. The next prime is 857053. The reversal of 857047 is 740758.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 857047 - 2³ = 857039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428523 + 428524.

It is an arithmetic number, because the mean of its divisors is an integer number (428524).

2⁸⁵⁷⁰⁴⁷ is an apocalyptic number.

857047 is a deficient number, since it is larger than the sum of its proper divisors (1).

857047 is an equidigital number, since it uses as much as digits as its factorization.

857047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 857047 is about 925.7683295512. The cubic root of 857047 is about 94.9878839581.

The spelling of 857047 in words is "eight hundred fifty-seven thousand, forty-seven".