3205121 has 4 divisors (see below), whose sum is σ = 3308544. Its totient is φ = 3101700.

The previous prime is 3205087. The next prime is 3205141. The reversal of 3205121 is 1215023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3205121 - 2¹⁸ = 2942977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3205096 and 3205105.

It is not an unprimeable number, because it can be changed into a prime (3205141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51665 + ... + 51726.

It is an arithmetic number, because the mean of its divisors is an integer number (827136).

It is a Proth number, since it is equal to 1565 ⋅ 2¹¹ + 1 and 1565 < 2¹¹.

Almost surely, 2^3205121 is an apocalyptic number.

3205121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3205121 is a deficient number, since it is larger than the sum of its proper divisors (103423).

3205121 is a wasteful number, since it uses less digits than its factorization.

3205121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103422.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 3205121 is about 1790.2851728147. The cubic root of 3205121 is about 147.4398260725.

The spelling of 3205121 in words is "three million, two hundred five thousand, one hundred twenty-one".