3118421 has 4 divisors (see below), whose sum is σ = 3139500. Its totient is φ = 3097344.

The previous prime is 3118417. The next prime is 3118433. The reversal of 3118421 is 1248113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 972196 + 2146225 = 986^2 + 1465^2 .

It is a cyclic number.

It is not a de Polignac number, because 3118421 - 2² = 3118417 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3118393 and 3118402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3118411) 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 3 ways as a sum of consecutive naturals, for example, 10316 + ... + 10613.

It is an arithmetic number, because the mean of its divisors is an integer number (784875).

Almost surely, 2^3118421 is an apocalyptic number.

It is an amenable number.

3118421 is a deficient number, since it is larger than the sum of its proper divisors (21079).

3118421 is a wasteful number, since it uses less digits than its factorization.

3118421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21078.

The product of its digits is 192, while the sum is 20.

The square root of 3118421 is about 1765.9051503408. The cubic root of 3118421 is about 146.0982168928.

The spelling of 3118421 in words is "three million, one hundred eighteen thousand, four hundred twenty-one".