494981 has 4 divisors (see below), whose sum is σ = 498732. Its totient is φ = 491232.

The previous prime is 494959. The next prime is 494987. The reversal of 494981 is 189494.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 189494 = 2 ⋅94747.

It can be written as a sum of positive squares in 2 ways, for example, as 93025 + 401956 = 305^2 + 634^2 .

It is a cyclic number.

It is not a de Polignac number, because 494981 - 2⁶ = 494917 is a prime.

It is a super-3 number, since 3×494981³ = 363820227333234423, which contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (494987) 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, 1670 + ... + 1943.

It is an arithmetic number, because the mean of its divisors is an integer number (124683).

2⁴⁹⁴⁹⁸¹ is an apocalyptic number.

It is an amenable number.

494981 is a deficient number, since it is larger than the sum of its proper divisors (3751).

494981 is a wasteful number, since it uses less digits than its factorization.

494981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3750.

The product of its digits is 10368, while the sum is 35.

The square root of 494981 is about 703.5488611319. The cubic root of 494981 is about 79.1035868090.

The spelling of 494981 in words is "four hundred ninety-four thousand, nine hundred eighty-one".