205412 has 12 divisors (see below), whose sum is σ = 364140. Its totient is φ = 101376.

The previous prime is 205399. The next prime is 205417. The reversal of 205412 is 214502.

It can be written as a sum of positive squares in 2 ways, for example, as 139876 + 65536 = 374^2 + 256^2 .

It is not an unprimeable number, because it can be changed into a prime (205417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68 + ... + 644.

It is an arithmetic number, because the mean of its divisors is an integer number (30345).

2²⁰⁵⁴¹² is an apocalyptic number.

It is an amenable number.

205412 is a deficient number, since it is larger than the sum of its proper divisors (158728).

205412 is a wasteful number, since it uses less digits than its factorization.

205412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 205412 is about 453.2240064251. The cubic root of 205412 is about 59.0031598423.

Adding to 205412 its reverse (214502), we get a palindrome (419914).

The spelling of 205412 in words is "two hundred five thousand, four hundred twelve".