3428421 has 8 divisors (see below), whose sum is σ = 4589184. Its totient is φ = 2276640.

The previous prime is 3428419. The next prime is 3428423. The reversal of 3428421 is 1248243.

3428421 = T₃ + T₄ + ... + T₂₇₃.

It is an interprime number because it is at equal distance from previous prime (3428419) and next prime (3428423).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3428421 - 2¹ = 3428419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3428391 and 3428400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3428423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1296 + ... + 2921.

It is an arithmetic number, because the mean of its divisors is an integer number (573648).

Almost surely, 2^3428421 is an apocalyptic number.

It is an amenable number.

3428421 is a deficient number, since it is larger than the sum of its proper divisors (1160763).

3428421 is a wasteful number, since it uses less digits than its factorization.

3428421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491.

The product of its digits is 1536, while the sum is 24.

The square root of 3428421 is about 1851.5995787427. The cubic root of 3428421 is about 150.7872828973.

The spelling of 3428421 in words is "three million, four hundred twenty-eight thousand, four hundred twenty-one".