857061 has 12 divisors (see below), whose sum is σ = 1284192. Its totient is φ = 571212.

The previous prime is 857053. The next prime is 857069. The reversal of 857061 is 160758.

It is an interprime number because it is at equal distance from previous prime (857053) and next prime (857069).

It is not a de Polignac number, because 857061 - 2³ = 857053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1521 + ... + 2006.

It is an arithmetic number, because the mean of its divisors is an integer number (107016).

2⁸⁵⁷⁰⁶¹ is an apocalyptic number.

857061 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

It is an amenable number.

857061 is a deficient number, since it is larger than the sum of its proper divisors (427131).

857061 is an equidigital number, since it uses as much as digits as its factorization.

857061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3542 (or 3530 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 857061 is about 925.7758908073. The cubic root of 857061 is about 94.9884011693.

The spelling of 857061 in words is "eight hundred fifty-seven thousand, sixty-one".