857055 has 16 divisors (see below), whose sum is σ = 1452384. Its totient is φ = 430080.

The previous prime is 857053. The next prime is 857069. The reversal of 857055 is 550758.

857055 = T₃₀₉ + T₃₁₀ + ... + T₃₂₅.

It is a happy number.

It is not a de Polignac number, because 857055 - 2¹ = 857053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1426 + ... + 1935.

It is an arithmetic number, because the mean of its divisors is an integer number (90774).

2⁸⁵⁷⁰⁵⁵ is an apocalyptic number.

857055 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

857055 is a deficient number, since it is larger than the sum of its proper divisors (595329).

857055 is a wasteful number, since it uses less digits than its factorization.

857055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386.

The product of its (nonzero) digits is 7000, while the sum is 30.

The square root of 857055 is about 925.7726502765. The cubic root of 857055 is about 94.9881795080.

It can be divided in two parts, 85 and 7055, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 857055 in words is "eight hundred fifty-seven thousand, fifty-five".