491274625 has 8 divisors (see below), whose sum is σ = 613110888. Its totient is φ = 393019600.

The previous prime is 491274569. The next prime is 491274643. The reversal of 491274625 is 526472194.

It can be written as a sum of positive squares in 4 ways, for example, as 111492481 + 379782144 = 10559^2 + 19488^2 .

It is not a de Polignac number, because 491274625 - 2¹⁵ = 491241857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1964974 + ... + 1965223.

It is an arithmetic number, because the mean of its divisors is an integer number (76638861).

Almost surely, 2^491274625 is an apocalyptic number.

It is an amenable number.

491274625 is a deficient number, since it is larger than the sum of its proper divisors (121836263).

491274625 is an equidigital number, since it uses as much as digits as its factorization.

491274625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3930212 (or 3930202 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 491274625 is about 22164.7157662804. The cubic root of 491274625 is about 789.0565166687.

The spelling of 491274625 in words is "four hundred ninety-one million, two hundred seventy-four thousand, six hundred twenty-five".