491140241 has 8 divisors (see below), whose sum is σ = 500739624. Its totient is φ = 481553280.

The previous prime is 491140231. The next prime is 491140283. The reversal of 491140241 is 142041194.

It can be written as a sum of positive squares in 4 ways, for example, as 243235216 + 247905025 = 15596^2 + 15745^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 491140241 - 2¹⁸ = 490878097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 491140241.

It is not an unprimeable number, because it can be changed into a prime (491140231) 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 7 ways as a sum of consecutive naturals, for example, 136931 + ... + 140471.

It is an arithmetic number, because the mean of its divisors is an integer number (62592453).

Almost surely, 2^491140241 is an apocalyptic number.

It is an amenable number.

491140241 is a deficient number, since it is larger than the sum of its proper divisors (9599383).

491140241 is a wasteful number, since it uses less digits than its factorization.

491140241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6211.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 491140241 is about 22161.6840740951. The cubic root of 491140241 is about 788.9845635387.

The spelling of 491140241 in words is "four hundred ninety-one million, one hundred forty thousand, two hundred forty-one".