494518 has 4 divisors (see below), whose sum is σ = 741780.
Its totient is φ = 247258.
The previous prime is 494497. The next prime is 494519. The reversal of 494518 is 815494.
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: 815494 = 2 ⋅407747.
It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a self number, because there is not a number n which added to its sum of digits gives 494518.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (494519) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123628 + ... + 123631.
It is an arithmetic number, because the mean of its divisors is an integer number (185445).
2494518 is an apocalyptic number.
494518 is a deficient number, since it is larger than the sum of its proper divisors (247262).
494518 is a wasteful number, since it uses less digits than its factorization.
494518 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 247261.
The product of its digits is 5760, while the sum is 31.
The square root of 494518 is about 703.2197380620.
The cubic root of 494518 is about 79.0789148949.
The spelling of 494518 in words is "four hundred ninety-four thousand, five hundred eighteen".