494991 has 28 divisors (see below), whose sum is σ = 856912. Its totient is φ = 279936.

The previous prime is 494987. The next prime is 495017. The reversal of 494991 is 199494.

494991 is nontrivially palindromic in base 2.

It is not a de Polignac number, because 494991 - 2² = 494987 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 494991.

It is not an unprimeable number, because it can be changed into a prime (494191) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 5055 + ... + 5151.

It is an arithmetic number, because the mean of its divisors is an integer number (30604).

2⁴⁹⁴⁹⁹¹ is an apocalyptic number.

494991 is a deficient number, since it is larger than the sum of its proper divisors (361921).

494991 is an frugal number, since it uses more digits than its factorization.

494991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122 (or 107 counting only the distinct ones).

The product of its digits is 11664, while the sum is 36.

The square root of 494991 is about 703.5559679230. Note that the first 3 decimals coincide. The cubic root of 494991 is about 79.1041195099.

It can be divided in two parts, 494 and 991, that added together give a triangular number (1485 = T₅₄).

The spelling of 494991 in words is "four hundred ninety-four thousand, nine hundred ninety-one".