3172161 has 4 divisors (see below), whose sum is σ = 4229552. Its totient is φ = 2114772.

The previous prime is 3172159. The next prime is 3172163. The reversal of 3172161 is 1612713.

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 an interprime number because it is at equal distance from previous prime (3172159) and next prime (3172163).

It is not a de Polignac number, because 3172161 - 2¹ = 3172159 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

3172161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3172163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528691 + ... + 528696.

It is an arithmetic number, because the mean of its divisors is an integer number (1057388).

Almost surely, 2^3172161 is an apocalyptic number.

It is an amenable number.

3172161 is a deficient number, since it is larger than the sum of its proper divisors (1057391).

3172161 is a wasteful number, since it uses less digits than its factorization.

3172161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1057390.

The product of its digits is 252, while the sum is 21.

The square root of 3172161 is about 1781.0561473463. The cubic root of 3172161 is about 146.9326823984.

Adding to 3172161 its reverse (1612713), we get a palindrome (4784874).

It can be divided in two parts, 3172 and 161, that added together give a palindrome (3333).

The spelling of 3172161 in words is "three million, one hundred seventy-two thousand, one hundred sixty-one".