491825 has 12 divisors (see below), whose sum is σ = 619008. Its totient is φ = 387600.

The previous prime is 491819. The next prime is 491833. The reversal of 491825 is 528194.

It is not a de Polignac number, because 491825 - 2¹⁴ = 475441 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 491825.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2480 + ... + 2670.

It is an arithmetic number, because the mean of its divisors is an integer number (51584).

2⁴⁹¹⁸²⁵ is an apocalyptic number.

It is an amenable number.

491825 is a deficient number, since it is larger than the sum of its proper divisors (127183).

491825 is a wasteful number, since it uses less digits than its factorization.

491825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 299 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 491825 is about 701.3023598991. The cubic root of 491825 is about 78.9351066727.

The spelling of 491825 in words is "four hundred ninety-one thousand, eight hundred twenty-five".