3120421 has 4 divisors (see below), whose sum is σ = 3160000. Its totient is φ = 3080844.

The previous prime is 3120413. The next prime is 3120437. The reversal of 3120421 is 1240213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1240213 = 13 ⋅95401.

It is a cyclic number.

It is not a de Polignac number, because 3120421 - 2³ = 3120413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120461) 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, 19671 + ... + 19828.

It is an arithmetic number, because the mean of its divisors is an integer number (790000).

Almost surely, 2^3120421 is an apocalyptic number.

It is an amenable number.

3120421 is a deficient number, since it is larger than the sum of its proper divisors (39579).

3120421 is an equidigital number, since it uses as much as digits as its factorization.

3120421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39578.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 3120421 is about 1766.4713414035. The cubic root of 3120421 is about 146.1294435926.

Adding to 3120421 its reverse (1240213), we get a palindrome (4360634).

The spelling of 3120421 in words is "three million, one hundred twenty thousand, four hundred twenty-one".