4891001 has 2 divisors, whose sum is σ = 4891002. Its totient is φ = 4891000.

The previous prime is 4890983. The next prime is 4891027. The reversal of 4891001 is 1001984.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4734976 + 156025 = 2176^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 4891001 - 2¹⁰ = 4889977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4891091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2445500 + 2445501.

It is an arithmetic number, because the mean of its divisors is an integer number (2445501).

Almost surely, 2^4891001 is an apocalyptic number.

It is an amenable number.

4891001 is a deficient number, since it is larger than the sum of its proper divisors (1).

4891001 is an equidigital number, since it uses as much as digits as its factorization.

4891001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 4891001 is about 2211.5607610916. The cubic root of 4891001 is about 169.7458833104.

Adding to 4891001 its reverse (1001984), we get a palindrome (5892985).

The spelling of 4891001 in words is "four million, eight hundred ninety-one thousand, one".