204437121 has 16 divisors (see below), whose sum is σ = 329848704. Its totient is φ = 109949184.

The previous prime is 204437117. The next prime is 204437137. The reversal of 204437121 is 121734402.

It is a happy number.

204437121 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 204437121 - 2² = 204437117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 204437091 and 204437100.

It is not an unprimeable number, because it can be changed into a prime (204437141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285970 + ... + 286683.

It is an arithmetic number, because the mean of its divisors is an integer number (20615544).

Almost surely, 2^204437121 is an apocalyptic number.

204437121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

204437121 is a deficient number, since it is larger than the sum of its proper divisors (125411583).

204437121 is a wasteful number, since it uses less digits than its factorization.

204437121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 572680.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 204437121 is about 14298.1509643730. The cubic root of 204437121 is about 589.0966939429.

The spelling of 204437121 in words is "two hundred four million, four hundred thirty-seven thousand, one hundred twenty-one".