857069 has 2 divisors, whose sum is σ = 857070. Its totient is φ = 857068.

The previous prime is 857053. The next prime is 857081. The reversal of 857069 is 960758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 1444 = 925^2 + 38^2 .

It is a cyclic number.

It is not a de Polignac number, because 857069 - 2⁴ = 857053 is a prime.

It is a super-2 number, since 2×857069² = 1469134541522, which contains 22 as substring.

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, 428534 + 428535.

It is an arithmetic number, because the mean of its divisors is an integer number (428535).

2⁸⁵⁷⁰⁶⁹ is an apocalyptic number.

It is an amenable number.

857069 is a deficient number, since it is larger than the sum of its proper divisors (1).

857069 is an equidigital number, since it uses as much as digits as its factorization.

857069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 857069 is about 925.7802114973. The cubic root of 857069 is about 94.9886967161.

The spelling of 857069 in words is "eight hundred fifty-seven thousand, sixty-nine".