491526 has 48 divisors (see below), whose sum is σ = 1257984. Its totient is φ = 135792.

The previous prime is 491503. The next prime is 491527. The reversal of 491526 is 625194.

It is a self number, because there is not a number n which added to its sum of digits gives 491526.

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 491526.

It is not an unprimeable number, because it can be changed into a prime (491527) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5881 + ... + 5963.

It is an arithmetic number, because the mean of its divisors is an integer number (26208).

491526 is a Friedman number, since it can be written as 6*(5*4^(9-2)+1), using all its digits and the basic arithmetic operations.

2⁴⁹¹⁵²⁶ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491526, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (628992).

491526 is an abundant number, since it is smaller than the sum of its proper divisors (766458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491526 is a wasteful number, since it uses less digits than its factorization.

491526 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 142 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 491526 is about 701.0891526760. The cubic root of 491526 is about 78.9191074986.

The spelling of 491526 in words is "four hundred ninety-one thousand, five hundred twenty-six".