3212161 has 4 divisors (see below), whose sum is σ = 3222612. Its totient is φ = 3201712.

The previous prime is 3212147. The next prime is 3212173. The reversal of 3212161 is 1612123.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1252161 + 1960000 = 1119^2 + 1400^2 .

It is a cyclic number.

It is not a de Polignac number, because 3212161 - 2¹¹ = 3210113 is a prime.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3212101) 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, 4750 + ... + 5383.

It is an arithmetic number, because the mean of its divisors is an integer number (805653).

Almost surely, 2^3212161 is an apocalyptic number.

It is an amenable number.

3212161 is a deficient number, since it is larger than the sum of its proper divisors (10451).

3212161 is a wasteful number, since it uses less digits than its factorization.

3212161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10450.

The product of its digits is 72, while the sum is 16.

The square root of 3212161 is about 1792.2502615427. The cubic root of 3212161 is about 147.5476969178.

Adding to 3212161 its reverse (1612123), we get a palindrome (4824284).

The spelling of 3212161 in words is "three million, two hundred twelve thousand, one hundred sixty-one".