491201 has 2 divisors, whose sum is σ = 491202. Its totient is φ = 491200.

The previous prime is 491171. The next prime is 491213. The reversal of 491201 is 102194.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 456976 + 34225 = 676^2 + 185^2 .

It is a cyclic number.

It is not a de Polignac number, because 491201 - 2⁶ = 491137 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 491201.

It is not a weakly prime, because it can be changed into another prime (491251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245600 + 245601.

It is an arithmetic number, because the mean of its divisors is an integer number (245601).

2⁴⁹¹²⁰¹ is an apocalyptic number.

It is an amenable number.

491201 is a deficient number, since it is larger than the sum of its proper divisors (1).

491201 is an equidigital number, since it uses as much as digits as its factorization.

491201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 491201 is about 700.8573321297. The cubic root of 491201 is about 78.9017097312.

Adding to 491201 its reverse (102194), we get a palindrome (593395).

The spelling of 491201 in words is "four hundred ninety-one thousand, two hundred one".