3204021421 has 4 divisors (see below), whose sum is σ = 3204434844. Its totient is φ = 3203608000.

The previous prime is 3204021409. The next prime is 3204021427. The reversal of 3204021421 is 1241204023.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1125938025 + 2078083396 = 33555^2 + 45586^2 .

It is a cyclic number.

It is not a de Polignac number, because 3204021421 - 2⁵ = 3204021389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3204021427) 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, 194860 + ... + 210661.

It is an arithmetic number, because the mean of its divisors is an integer number (801108711).

Almost surely, 2^3204021421 is an apocalyptic number.

It is an amenable number.

3204021421 is a deficient number, since it is larger than the sum of its proper divisors (413423).

3204021421 is an equidigital number, since it uses as much as digits as its factorization.

3204021421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413422.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 3204021421 is about 56604.0760104783. The cubic root of 3204021421 is about 1474.2296344549.

Adding to 3204021421 its reverse (1241204023), we get a palindrome (4445225444).

The spelling of 3204021421 in words is "three billion, two hundred four million, twenty-one thousand, four hundred twenty-one".