494905 has 4 divisors (see below), whose sum is σ = 593892. Its totient is φ = 395920.

The previous prime is 494903. The next prime is 494917. The reversal of 494905 is 509494.

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: 509494 = 2 ⋅254747.

It can be written as a sum of positive squares in 2 ways, for example, as 95481 + 399424 = 309^2 + 632^2 .

It is not a de Polignac number, because 494905 - 2¹ = 494903 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (494903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49486 + ... + 49495.

It is an arithmetic number, because the mean of its divisors is an integer number (148473).

2⁴⁹⁴⁹⁰⁵ is an apocalyptic number.

It is an amenable number.

494905 is a deficient number, since it is larger than the sum of its proper divisors (98987).

494905 is an equidigital number, since it uses as much as digits as its factorization.

494905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98986.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 494905 is about 703.4948471737. The cubic root of 494905 is about 79.0995380473.

The spelling of 494905 in words is "four hundred ninety-four thousand, nine hundred five".