1205553500 has 24 divisors (see below), whose sum is σ = 2632929936. Its totient is φ = 482221200.

The previous prime is 1205553497. The next prime is 1205553541. The reversal of 1205553500 is 53555021.

It is a self number, because there is not a number n which added to its sum of digits gives 1205553500.

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, 1205054 + ... + 1206053.

It is an arithmetic number, because the mean of its divisors is an integer number (109705414).

Almost surely, 2^1205553500 is an apocalyptic number.

1205553500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1205553500 is an abundant number, since it is smaller than the sum of its proper divisors (1427376436).

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

1205553500 is a wasteful number, since it uses less digits than its factorization.

1205553500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2411126 (or 2411114 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 26.

The square root of 1205553500 is about 34721.0814923729. The cubic root of 1205553500 is about 1064.2953452534.

The spelling of 1205553500 in words is "one billion, two hundred five million, five hundred fifty-three thousand, five hundred".