2004132421 has 2 divisors, whose sum is σ = 2004132422. Its totient is φ = 2004132420.

The previous prime is 2004132409. The next prime is 2004132457. The reversal of 2004132421 is 1242314002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1992640321 + 11492100 = 44639^2 + 3390^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2004132421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2004132401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1002066210 + 1002066211.

It is an arithmetic number, because the mean of its divisors is an integer number (1002066211).

Almost surely, 2^2004132421 is an apocalyptic number.

It is an amenable number.

2004132421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2004132421 is an equidigital number, since it uses as much as digits as its factorization.

2004132421 is an evil number, because the sum of its binary digits is even.

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

The square root of 2004132421 is about 44767.5375802601. The cubic root of 2004132421 is about 1260.7882069600.

Adding to 2004132421 its reverse (1242314002), we get a palindrome (3246446423).

The spelling of 2004132421 in words is "two billion, four million, one hundred thirty-two thousand, four hundred twenty-one".