3111001 has 2 divisors, whose sum is σ = 3111002. Its totient is φ = 3111000.

The previous prime is 3110999. The next prime is 3111013. The reversal of 3111001 is 1001113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 30976 = 1755^2 + 176^2 .

It is a cyclic number.

It is not a de Polignac number, because 3111001 - 2¹ = 3110999 is a prime.

Together with 3110999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (3111301) 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, 1555500 + 1555501.

It is an arithmetic number, because the mean of its divisors is an integer number (1555501).

Almost surely, 2^3111001 is an apocalyptic number.

It is an amenable number.

3111001 is a deficient number, since it is larger than the sum of its proper divisors (1).

3111001 is an equidigital number, since it uses as much as digits as its factorization.

3111001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3, while the sum is 7.

The square root of 3111001 is about 1763.8029935341. The cubic root of 3111001 is about 145.9822490460.

Adding to 3111001 its reverse (1001113), we get a palindrome (4112114).

The spelling of 3111001 in words is "three million, one hundred eleven thousand, one".