1205035220 has 12 divisors (see below), whose sum is σ = 2530574004. Its totient is φ = 482014080.

The previous prime is 1205035219. The next prime is 1205035243. The reversal of 1205035220 is 225305021.

It can be written as a sum of positive squares in 2 ways, for example, as 175138756 + 1029896464 = 13234^2 + 32092^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 60251761 = 1205035220 / (1 + 2 + 0 + 5 + 0 + 3 + 5 + 2 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 1205035192 and 1205035201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30125861 + ... + 30125900.

It is an arithmetic number, because the mean of its divisors is an integer number (210881167).

Almost surely, 2^1205035220 is an apocalyptic number.

1205035220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205035220 is an abundant number, since it is smaller than the sum of its proper divisors (1325538784).

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

1205035220 is a wasteful number, since it uses less digits than its factorization.

1205035220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60251770 (or 60251768 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 1205035220 is about 34713.6172128460. The cubic root of 1205035220 is about 1064.1428061757.

The spelling of 1205035220 in words is "one billion, two hundred five million, thirty-five thousand, two hundred twenty".