1205061020 has 24 divisors (see below), whose sum is σ = 2543885568. Its totient is φ = 479499200.

The previous prime is 1205061019. The next prime is 1205061043. The reversal of 1205061020 is 201605021.

It is a self number, because there is not a number n which added to its sum of digits gives 1205061020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153911 + ... + 161550.

It is an arithmetic number, because the mean of its divisors is an integer number (105995232).

Almost surely, 2^1205061020 is an apocalyptic number.

1205061020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205061020 is an abundant number, since it is smaller than the sum of its proper divisors (1338824548).

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

1205061020 is a wasteful number, since it uses less digits than its factorization.

1205061020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315661 (or 315659 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 1205061020 is about 34713.9888229515. The cubic root of 1205061020 is about 1064.1504006116.

Adding to 1205061020 its reverse (201605021), we get a palindrome (1406666041).

The spelling of 1205061020 in words is "one billion, two hundred five million, sixty-one thousand, twenty".