204125105 has 4 divisors (see below), whose sum is σ = 244950132. Its totient is φ = 163300080.

The previous prime is 204125087. The next prime is 204125123. The reversal of 204125105 is 501521402.

204125105 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 501521402 = 2 ⋅250760701.

It is an interprime number because it is at equal distance from previous prime (204125087) and next prime (204125123).

It can be written as a sum of positive squares in 2 ways, for example, as 51380224 + 152744881 = 7168^2 + 12359^2 .

It is not a de Polignac number, because 204125105 - 2¹⁴ = 204108721 is a prime.

It is a super-2 number, since 2×204125105² = 83334116982522050, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20412506 + ... + 20412515.

It is an arithmetic number, because the mean of its divisors is an integer number (61237533).

Almost surely, 2^204125105 is an apocalyptic number.

It is an amenable number.

204125105 is a deficient number, since it is larger than the sum of its proper divisors (40825027).

204125105 is an equidigital number, since it uses as much as digits as its factorization.

204125105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40825026.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 204125105 is about 14287.2357368387. The cubic root of 204125105 is about 588.7968443155.

Adding to 204125105 its reverse (501521402), we get a palindrome (705646507).

The spelling of 204125105 in words is "two hundred four million, one hundred twenty-five thousand, one hundred five".