3118021 has 6 divisors (see below), whose sum is σ = 3312530. Its totient is φ = 2934336.

The previous prime is 3118013. The next prime is 3118067. The reversal of 3118021 is 1208113.

It can be written as a sum of positive squares in 3 ways, for example, as 1185921 + 1932100 = 1089^2 + 1390^2 .

It is not a de Polignac number, because 3118021 - 2³ = 3118013 is a prime.

It is a Duffinian number.

3118021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3117986 and 3118004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3118081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5106 + ... + 5683.

Almost surely, 2^3118021 is an apocalyptic number.

It is an amenable number.

3118021 is a deficient number, since it is larger than the sum of its proper divisors (194509).

3118021 is a wasteful number, since it uses less digits than its factorization.

3118021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10823 (or 10806 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 3118021 is about 1765.7918903427. The cubic root of 3118021 is about 146.0919699508.

The spelling of 3118021 in words is "three million, one hundred eighteen thousand, twenty-one".