3120813 has 12 divisors (see below), whose sum is σ = 4543968. Its totient is φ = 2063880.

The previous prime is 3120791. The next prime is 3120827. The reversal of 3120813 is 3180213.

It is not a de Polignac number, because 3120813 - 2¹³ = 3112621 is a prime.

3120813 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120833) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145 + ... + 2502.

It is an arithmetic number, because the mean of its divisors is an integer number (378664).

Almost surely, 2^3120813 is an apocalyptic number.

It is an amenable number.

3120813 is a deficient number, since it is larger than the sum of its proper divisors (1423155).

3120813 is a wasteful number, since it uses less digits than its factorization.

3120813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2784 (or 2781 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 3120813 is about 1766.5822935827. The cubic root of 3120813 is about 146.1355624617.

The spelling of 3120813 in words is "three million, one hundred twenty thousand, eight hundred thirteen".