3121206 has 48 divisors (see below), whose sum is σ = 7242048. Its totient is φ = 889200.

The previous prime is 3121201. The next prime is 3121219. The reversal of 3121206 is 6021213.

3121206 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23761 + ... + 23891.

It is an arithmetic number, because the mean of its divisors is an integer number (150876).

Almost surely, 2^3121206 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3121206, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3621024).

3121206 is an abundant number, since it is smaller than the sum of its proper divisors (4120842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3121206 is a wasteful number, since it uses less digits than its factorization.

3121206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 3121206 is about 1766.6935218085. The cubic root of 3121206 is about 146.1416964259.

Adding to 3121206 its reverse (6021213), we get a palindrome (9142419).

The spelling of 3121206 in words is "three million, one hundred twenty-one thousand, two hundred six".