3121085 has 8 divisors (see below), whose sum is σ = 4085856. Its totient is φ = 2269840.

The previous prime is 3121057. The next prime is 3121087. The reversal of 3121085 is 5801213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-3121085 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28319 + ... + 28428.

It is an arithmetic number, because the mean of its divisors is an integer number (510732).

Almost surely, 2^3121085 is an apocalyptic number.

It is an amenable number.

3121085 is a deficient number, since it is larger than the sum of its proper divisors (964771).

3121085 is a wasteful number, since it uses less digits than its factorization.

3121085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56763.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 3121085 is about 1766.6592767141. The cubic root of 3121085 is about 146.1398079066.

Adding to 3121085 its reverse (5801213), we get a palindrome (8922298).

The spelling of 3121085 in words is "three million, one hundred twenty-one thousand, eighty-five".