204671421 has 8 divisors (see below), whose sum is σ = 303216960. Its totient is φ = 136447596.

The previous prime is 204671351. The next prime is 204671429. The reversal of 204671421 is 124176402.

204671421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 204671421 - 2⁷ = 204671293 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 7580423 = 204671421 / (2 + 0 + 4 + 6 + 7 + 1 + 4 + 2 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204671429) 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, 3790185 + ... + 3790238.

It is an arithmetic number, because the mean of its divisors is an integer number (37902120).

Almost surely, 2^204671421 is an apocalyptic number.

It is an amenable number.

204671421 is a deficient number, since it is larger than the sum of its proper divisors (98545539).

204671421 is an equidigital number, since it uses as much as digits as its factorization.

204671421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7580432 (or 7580426 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 204671421 is about 14306.3419852875. The cubic root of 204671421 is about 589.3216574251.

The spelling of 204671421 in words is "two hundred four million, six hundred seventy-one thousand, four hundred twenty-one".