3207121 has 2 divisors, whose sum is σ = 3207122. Its totient is φ = 3207120.

The previous prime is 3207119. The next prime is 3207133. The reversal of 3207121 is 1217023.

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., 1718721 + 1488400 = 1311^2 + 1220^2 .

It is an emirp because it is prime and its reverse (1217023) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3207121 - 2¹ = 3207119 is a prime.

Together with 3207119, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3207095 and 3207104.

It is not a weakly prime, because it can be changed into another prime (3207151) 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, 1603560 + 1603561.

It is an arithmetic number, because the mean of its divisors is an integer number (1603561).

Almost surely, 2^3207121 is an apocalyptic number.

It is an amenable number.

3207121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3207121 is an equidigital number, since it uses as much as digits as its factorization.

3207121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 3207121 is about 1790.8436559343. The cubic root of 3207121 is about 147.4704872486.

The spelling of 3207121 in words is "three million, two hundred seven thousand, one hundred twenty-one".