491625 has 48 divisors (see below), whose sum is σ = 973440. Its totient is φ = 237600.

The previous prime is 491611. The next prime is 491627. The reversal of 491625 is 526194.

It is not a de Polignac number, because 491625 - 2⁵ = 491593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491627) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21364 + ... + 21386.

It is an arithmetic number, because the mean of its divisors is an integer number (20280).

2⁴⁹¹⁶²⁵ is an apocalyptic number.

491625 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

491625 is a deficient number, since it is larger than the sum of its proper divisors (481815).

491625 is a wasteful number, since it uses less digits than its factorization.

491625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63 (or 50 counting only the distinct ones).

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

The square root of 491625 is about 701.1597535512. The cubic root of 491625 is about 78.9244056023.

The spelling of 491625 in words is "four hundred ninety-one thousand, six hundred twenty-five".