3209421 has 4 divisors (see below), whose sum is σ = 4279232. Its totient is φ = 2139612.

The previous prime is 3209419. The next prime is 3209431. The reversal of 3209421 is 1249023.

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.

It is not a de Polignac number, because 3209421 - 2¹ = 3209419 is a prime.

It is a D-number.

It is a Duffinian number.

3209421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3209431) 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, 534901 + ... + 534906.

It is an arithmetic number, because the mean of its divisors is an integer number (1069808).

Almost surely, 2^3209421 is an apocalyptic number.

It is an amenable number.

3209421 is a deficient number, since it is larger than the sum of its proper divisors (1069811).

3209421 is a wasteful number, since it uses less digits than its factorization.

3209421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069810.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 3209421 is about 1791.4856962867. The cubic root of 3209421 is about 147.5057318466.

The spelling of 3209421 in words is "three million, two hundred nine thousand, four hundred twenty-one".