205601129 has 2 divisors, whose sum is σ = 205601130. Its totient is φ = 205601128.

The previous prime is 205601113. The next prime is 205601177. The reversal of 205601129 is 921106502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110733529 + 94867600 = 10523^2 + 9740^2 .

It is a cyclic number.

It is not a de Polignac number, because 205601129 - 2⁴ = 205601113 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 205601098 and 205601107.

It is not a weakly prime, because it can be changed into another prime (205601629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102800564 + 102800565.

It is an arithmetic number, because the mean of its divisors is an integer number (102800565).

Almost surely, 2^205601129 is an apocalyptic number.

It is an amenable number.

205601129 is a deficient number, since it is larger than the sum of its proper divisors (1).

205601129 is an equidigital number, since it uses as much as digits as its factorization.

205601129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 205601129 is about 14338.7980319133. The cubic root of 205601129 is about 590.2126294804.

The spelling of 205601129 in words is "two hundred five million, six hundred one thousand, one hundred twenty-nine".