857741 has 2 divisors, whose sum is σ = 857742. Its totient is φ = 857740.

The previous prime is 857737. The next prime is 857743. The reversal of 857741 is 147758.

857741 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 855625 + 2116 = 925^2 + 46^2 .

It is a cyclic number.

It is not a de Polignac number, because 857741 - 2² = 857737 is a prime.

Together with 857743, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 857698 and 857707.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428870 + 428871.

It is an arithmetic number, because the mean of its divisors is an integer number (428871).

2⁸⁵⁷⁷⁴¹ is an apocalyptic number.

It is an amenable number.

857741 is a deficient number, since it is larger than the sum of its proper divisors (1).

857741 is an equidigital number, since it uses as much as digits as its factorization.

857741 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7840, while the sum is 32.

The square root of 857741 is about 926.1430774994. The cubic root of 857741 is about 95.0135160825.

The spelling of 857741 in words is "eight hundred fifty-seven thousand, seven hundred forty-one".