492857 has 4 divisors (see below), whose sum is σ = 498036. Its totient is φ = 487680.

The previous prime is 492853. The next prime is 492871. The reversal of 492857 is 758294.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 758294 = 2 ⋅379147.

It can be written as a sum of positive squares in 2 ways, for example, as 137641 + 355216 = 371^2 + 596^2 .

It is a cyclic number.

It is not a de Polignac number, because 492857 - 2² = 492853 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (492853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2444 + ... + 2637.

It is an arithmetic number, because the mean of its divisors is an integer number (124509).

2⁴⁹²⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

492857 is a deficient number, since it is larger than the sum of its proper divisors (5179).

492857 is an equidigital number, since it uses as much as digits as its factorization.

492857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5178.

The product of its digits is 20160, while the sum is 35.

The square root of 492857 is about 702.0377482728. The cubic root of 492857 is about 78.9902781392.

The spelling of 492857 in words is "four hundred ninety-two thousand, eight hundred fifty-seven".