491241265 has 16 divisors (see below), whose sum is σ = 624937680. Its totient is φ = 369418240.

The previous prime is 491241241. The next prime is 491241277. The reversal of 491241265 is 562142194.

It can be written as a sum of positive squares in 8 ways, for example, as 129937201 + 361304064 = 11399^2 + 19008^2 .

It is not a de Polignac number, because 491241265 - 2⁹ = 491240753 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491241265.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75855 + ... + 82075.

It is an arithmetic number, because the mean of its divisors is an integer number (39058605).

Almost surely, 2^491241265 is an apocalyptic number.

It is an amenable number.

491241265 is a deficient number, since it is larger than the sum of its proper divisors (133696415).

491241265 is a wasteful number, since it uses less digits than its factorization.

491241265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7172.

The product of its digits is 17280, while the sum is 34.

The square root of 491241265 is about 22163.9632060694. The cubic root of 491241265 is about 789.0386559720.

The spelling of 491241265 in words is "four hundred ninety-one million, two hundred forty-one thousand, two hundred sixty-five".