3121361 has 2 divisors, whose sum is σ = 3121362. Its totient is φ = 3121360.

The previous prime is 3121333. The next prime is 3121367. The reversal of 3121361 is 1631213.

3121361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2890000 + 231361 = 1700^2 + 481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121361 is a prime.

It is not a weakly prime, because it can be changed into another prime (3121367) 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, 1560680 + 1560681.

It is an arithmetic number, because the mean of its divisors is an integer number (1560681).

Almost surely, 2^3121361 is an apocalyptic number.

It is an amenable number.

3121361 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121361 is an equidigital number, since it uses as much as digits as its factorization.

3121361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 17.

The square root of 3121361 is about 1766.7373885216. The cubic root of 3121361 is about 146.1441155323.

Adding to 3121361 its reverse (1631213), we get a palindrome (4752574).

The spelling of 3121361 in words is "three million, one hundred twenty-one thousand, three hundred sixty-one".