1205450550 has 72 divisors (see below), whose sum is σ = 3299815584. Its totient is φ = 315382080.

The previous prime is 1205450549. The next prime is 1205450579. The reversal of 1205450550 is 550545021.

1205450550 is a `hidden beast` number, since 1 + 205 + 450 + 5 + 5 + 0 = 666.

It is a super-2 number, since 2×1205450550² = 2906222056990605000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1422 + ... + 49121.

It is an arithmetic number, because the mean of its divisors is an integer number (45830772).

Almost surely, 2^1205450550 is an apocalyptic number.

1205450550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1205450550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1649907792).

1205450550 is an abundant number, since it is smaller than the sum of its proper divisors (2094365034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1205450550 is a wasteful number, since it uses less digits than its factorization.

1205450550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50614 (or 50606 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 1205450550 is about 34719.5989320153. The cubic root of 1205450550 is about 1064.2650487063.

Adding to 1205450550 its reverse (550545021), we get a palindrome (1755995571).

The spelling of 1205450550 in words is "one billion, two hundred five million, four hundred fifty thousand, five hundred fifty".