491405325 has 48 divisors (see below), whose sum is σ = 848386176. Its totient is φ = 250732800.

The previous prime is 491405297. The next prime is 491405329. The reversal of 491405325 is 523504194.

It is not a de Polignac number, because 491405325 - 2⁷ = 491405197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491405329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 167824 + ... + 170726.

It is an arithmetic number, because the mean of its divisors is an integer number (17674712).

Almost surely, 2^491405325 is an apocalyptic number.

It is an amenable number.

491405325 is a deficient number, since it is larger than the sum of its proper divisors (356980851).

491405325 is a wasteful number, since it uses less digits than its factorization.

491405325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3014 (or 3009 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 491405325 is about 22167.6639499971. The cubic root of 491405325 is about 789.1264846914.

Adding to 491405325 its product of nonzero digits (21600), we get a triangular number (491426925 = T₃₁₃₅₀).

The spelling of 491405325 in words is "four hundred ninety-one million, four hundred five thousand, three hundred twenty-five".