3121343 has 4 divisors (see below), whose sum is σ = 3126288. Its totient is φ = 3116400.

The previous prime is 3121333. The next prime is 3121361. The reversal of 3121343 is 3431213.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 3121343 - 2⁸ = 3121087 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3121303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1358 + ... + 2843.

It is an arithmetic number, because the mean of its divisors is an integer number (781572).

Almost surely, 2^3121343 is an apocalyptic number.

3121343 is a deficient number, since it is larger than the sum of its proper divisors (4945).

3121343 is an equidigital number, since it uses as much as digits as its factorization.

3121343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4944.

The product of its digits is 216, while the sum is 17.

The square root of 3121343 is about 1766.7322943785. The cubic root of 3121343 is about 146.1438346079.

Adding to 3121343 its reverse (3431213), we get a palindrome (6552556).

The spelling of 3121343 in words is "three million, one hundred twenty-one thousand, three hundred forty-three".