3121172 has 12 divisors (see below), whose sum is σ = 5609940. Its totient is φ = 1518336.

The previous prime is 3121163. The next prime is 3121177. The reversal of 3121172 is 2711213.

It can be written as a sum of positive squares in 2 ways, for example, as 2972176 + 148996 = 1724^2 + 386^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3121172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121177) 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, 10397 + ... + 10692.

It is an arithmetic number, because the mean of its divisors is an integer number (467495).

Almost surely, 2^3121172 is an apocalyptic number.

It is an amenable number.

3121172 is a deficient number, since it is larger than the sum of its proper divisors (2488768).

3121172 is a wasteful number, since it uses less digits than its factorization.

3121172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21130 (or 21128 counting only the distinct ones).

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

The square root of 3121172 is about 1766.6838992870. The cubic root of 3121172 is about 146.1411657725.

Adding to 3121172 its reverse (2711213), we get a palindrome (5832385).

The spelling of 3121172 in words is "three million, one hundred twenty-one thousand, one hundred seventy-two".