857039 has 2 divisors, whose sum is σ = 857040. Its totient is φ = 857038.

The previous prime is 857029. The next prime is 857047. The reversal of 857039 is 930758.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857039 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 856996 and 857014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428519 + 428520.

It is an arithmetic number, because the mean of its divisors is an integer number (428520).

2⁸⁵⁷⁰³⁹ is an apocalyptic number.

857039 is a deficient number, since it is larger than the sum of its proper divisors (1).

857039 is an equidigital number, since it uses as much as digits as its factorization.

857039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 857039 is about 925.7640088057. The cubic root of 857039 is about 94.9875884062.

The spelling of 857039 in words is "eight hundred fifty-seven thousand, thirty-nine".