205612 has 12 divisors (see below), whose sum is σ = 392616. Its totient is φ = 93440.

The previous prime is 205607. The next prime is 205619. The reversal of 205612 is 216502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (205619) by changing a digit.

205612 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2293 + ... + 2380.

It is an arithmetic number, because the mean of its divisors is an integer number (32718).

2²⁰⁵⁶¹² is an apocalyptic number.

205612 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

205612 is a deficient number, since it is larger than the sum of its proper divisors (187004).

205612 is a wasteful number, since it uses less digits than its factorization.

205612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688 (or 4686 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 205612 is about 453.4445941899. Note that the first 3 decimals coincide. The cubic root of 205612 is about 59.0223031642.

The spelling of 205612 in words is "two hundred five thousand, six hundred twelve".