1205605606 has 4 divisors (see below), whose sum is σ = 1808408412. Its totient is φ = 602802802.

The previous prime is 1205605553. The next prime is 1205605673. The reversal of 1205605606 is 6065065021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6065065021 = 71 ⋅85423451.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 301401400 + ... + 301401403.

It is an arithmetic number, because the mean of its divisors is an integer number (452102103).

Almost surely, 2^1205605606 is an apocalyptic number.

1205605606 is a deficient number, since it is larger than the sum of its proper divisors (602802806).

1205605606 is an equidigital number, since it uses as much as digits as its factorization.

1205605606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 602802805.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 1205605606 is about 34721.8318353165. The cubic root of 1205605606 is about 1064.3106785627.

The spelling of 1205605606 in words is "one billion, two hundred five million, six hundred five thousand, six hundred six".