3217121 has 2 divisors, whose sum is σ = 3217122. Its totient is φ = 3217120.

The previous prime is 3217091. The next prime is 3217133. The reversal of 3217121 is 1217123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2217121 + 1000000 = 1489^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 3217121 - 2¹⁴ = 3200737 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3217121.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3217141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1608560 + 1608561.

It is an arithmetic number, because the mean of its divisors is an integer number (1608561).

Almost surely, 2^3217121 is an apocalyptic number.

It is an amenable number.

3217121 is a deficient number, since it is larger than the sum of its proper divisors (1).

3217121 is an equidigital number, since it uses as much as digits as its factorization.

3217121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84, while the sum is 17.

The square root of 3217121 is about 1793.6334631134. The cubic root of 3217121 is about 147.6236022264.

The spelling of 3217121 in words is "three million, two hundred seventeen thousand, one hundred twenty-one".