2391001 has 2 divisors, whose sum is σ = 2391002. Its totient is φ = 2391000.

The previous prime is 2390987. The next prime is 2391013. The reversal of 2391001 is 1001932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2059225 + 331776 = 1435^2 + 576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2391001 is a prime.

It is not a weakly prime, because it can be changed into another prime (2391041) 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 as a sum of consecutive naturals, namely, 1195500 + 1195501.

It is an arithmetic number, because the mean of its divisors is an integer number (1195501).

2^2391001 is an apocalyptic number.

It is an amenable number.

2391001 is a deficient number, since it is larger than the sum of its proper divisors (1).

2391001 is an equidigital number, since it uses as much as digits as its factorization.

2391001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 2391001 is about 1546.2861960194. The cubic root of 2391001 is about 133.7190407862.

Adding to 2391001 its reverse (1001932), we get a palindrome (3392933).

The spelling of 2391001 in words is "two million, three hundred ninety-one thousand, one".