491049 has 16 divisors (see below), whose sum is σ = 784000. Its totient is φ = 301968.

The previous prime is 491041. The next prime is 491059. The reversal of 491049 is 940194.

It is not a de Polignac number, because 491049 - 2³ = 491041 is a prime.

It is a super-2 number, since 2×491049² = 482258240802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (491041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 349 + ... + 1050.

It is an arithmetic number, because the mean of its divisors is an integer number (49000).

2⁴⁹¹⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

491049 is a deficient number, since it is larger than the sum of its proper divisors (292951).

491049 is a wasteful number, since it uses less digits than its factorization.

491049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421 (or 1415 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 491049 is about 700.7488851222. The cubic root of 491049 is about 78.8935702953.

The spelling of 491049 in words is "four hundred ninety-one thousand, forty-nine".