493257 has 4 divisors (see below), whose sum is σ = 657680. Its totient is φ = 328836.

The previous prime is 493249. The next prime is 493277. The reversal of 493257 is 752394.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 493257 - 2³ = 493249 is a prime.

It is a D-number.

It is a Duffinian number.

493257 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (493217) 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, 82207 + ... + 82212.

It is an arithmetic number, because the mean of its divisors is an integer number (164420).

2⁴⁹³²⁵⁷ is an apocalyptic number.

It is an amenable number.

493257 is a deficient number, since it is larger than the sum of its proper divisors (164423).

493257 is a wasteful number, since it uses less digits than its factorization.

493257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164422.

The product of its digits is 7560, while the sum is 30.

The square root of 493257 is about 702.3225754595. The cubic root of 493257 is about 79.0116417176.

The spelling of 493257 in words is "four hundred ninety-three thousand, two hundred fifty-seven".