3378421 has 4 divisors (see below), whose sum is σ = 3383712. Its totient is φ = 3373132.

The previous prime is 3378391. The next prime is 3378439. The reversal of 3378421 is 1248733.

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: 1248733 = 53 ⋅23561.

It is a cyclic number.

It is not a de Polignac number, because 3378421 - 2⁷ = 3378293 is a prime.

It is a super-2 number, since 2×3378421² = 22827456906482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3378421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3378451) 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, 1531 + ... + 3016.

It is an arithmetic number, because the mean of its divisors is an integer number (845928).

Almost surely, 2^3378421 is an apocalyptic number.

It is an amenable number.

3378421 is a deficient number, since it is larger than the sum of its proper divisors (5291).

3378421 is an equidigital number, since it uses as much as digits as its factorization.

3378421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5290.

The product of its digits is 4032, while the sum is 28.

The square root of 3378421 is about 1838.0481495325. The cubic root of 3378421 is about 150.0506643670.

The spelling of 3378421 in words is "three million, three hundred seventy-eight thousand, four hundred twenty-one".