1200553520 has 40 divisors (see below), whose sum is σ = 2826634560. Its totient is φ = 474140160.

The previous prime is 1200553511. The next prime is 1200553531. The reversal of 1200553520 is 253550021.

It is a tau number, because it is divible by the number of its divisors (40).

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, 88661 + ... + 101300.

It is an arithmetic number, because the mean of its divisors is an integer number (70665864).

Almost surely, 2^1200553520 is an apocalyptic number.

1200553520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200553520 is an abundant number, since it is smaller than the sum of its proper divisors (1626081040).

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

1200553520 is a wasteful number, since it uses less digits than its factorization.

1200553520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190053 (or 190047 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 1200553520 is about 34649.0046033071. The cubic root of 1200553520 is about 1062.8219337256.

The spelling of 1200553520 in words is "one billion, two hundred million, five hundred fifty-three thousand, five hundred twenty".