857742 has 16 divisors (see below), whose sum is σ = 1745280. Its totient is φ = 280952.

The previous prime is 857741. The next prime is 857743. The reversal of 857742 is 247758.

857742 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (857741) and next prime (857743).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 858 + ... + 1565.

It is an arithmetic number, because the mean of its divisors is an integer number (109080).

2⁸⁵⁷⁷⁴² is an apocalyptic number.

857742 is an abundant number, since it is smaller than the sum of its proper divisors (887538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857742 is a wasteful number, since it uses less digits than its factorization.

857742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2487.

The product of its digits is 15680, while the sum is 33.

The square root of 857742 is about 926.1436173726. The cubic root of 857742 is about 95.0135530064.

The spelling of 857742 in words is "eight hundred fifty-seven thousand, seven hundred forty-two".