491020625 has 20 divisors (see below), whose sum is σ = 633397248. Its totient is φ = 380130000.

The previous prime is 491020603. The next prime is 491020631. The reversal of 491020625 is 526020194.

It is a happy number.

491020625 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 491020625 - 2⁶ = 491020561 is a prime.

It is a super-2 number, since 2×491020625² = 482202508350781250, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6704 + ... + 32046.

Almost surely, 2^491020625 is an apocalyptic number.

It is an amenable number.

491020625 is a deficient number, since it is larger than the sum of its proper divisors (142376623).

491020625 is an equidigital number, since it uses as much as digits as its factorization.

491020625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25394 (or 25379 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 491020625 is about 22158.9851978830. The cubic root of 491020625 is about 788.9205065869.

The spelling of 491020625 in words is "four hundred ninety-one million, twenty thousand, six hundred twenty-five".