491425 has 12 divisors (see below), whose sum is σ = 665136. Its totient is φ = 357200.

The previous prime is 491423. The next prime is 491429. The reversal of 491425 is 524194.

It is not a de Polignac number, because 491425 - 2¹ = 491423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

491425 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 491425.

It is not an unprimeable number, because it can be changed into a prime (491423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 619 + ... + 1168.

It is an arithmetic number, because the mean of its divisors is an integer number (55428).

2⁴⁹¹⁴²⁵ is an apocalyptic number.

It is an amenable number.

491425 is a deficient number, since it is larger than the sum of its proper divisors (173711).

491425 is a wasteful number, since it uses less digits than its factorization.

491425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1808 (or 1803 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 491425 is about 701.0171181933. The cubic root of 491425 is about 78.9137016294.

The spelling of 491425 in words is "four hundred ninety-one thousand, four hundred twenty-five".