329421 has 4 divisors (see below), whose sum is σ = 439232. Its totient is φ = 219612.

The previous prime is 329419. The next prime is 329431. The reversal of 329421 is 124923.

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: 124923 = 3 ⋅41641.

It is not a de Polignac number, because 329421 - 2¹ = 329419 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3 + 2⁵ + 4⁹ + 9⁵ + 2¹³ + 1 .

It is a D-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 (329401) 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, 54901 + ... + 54906.

It is an arithmetic number, because the mean of its divisors is an integer number (109808).

2³²⁹⁴²¹ is an apocalyptic number.

It is an amenable number.

329421 is a deficient number, since it is larger than the sum of its proper divisors (109811).

329421 is a wasteful number, since it uses less digits than its factorization.

329421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109810.

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

The square root of 329421 is about 573.9520885928. The cubic root of 329421 is about 69.0637931345.

It can be divided in two parts, 32 and 9421, that added together give a triangular number (9453 = T₁₃₇).

The spelling of 329421 in words is "three hundred twenty-nine thousand, four hundred twenty-one".