1200355120 has 20 divisors (see below), whose sum is σ = 2790825840. Its totient is φ = 480142016.

The previous prime is 1200355109. The next prime is 1200355127. The reversal of 1200355120 is 215530021.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1200355120² = 2881704828220428800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1200355127) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 7502140 + ... + 7502299.

It is an arithmetic number, because the mean of its divisors is an integer number (139541292).

Almost surely, 2^1200355120 is an apocalyptic number.

1200355120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200355120 is an abundant number, since it is smaller than the sum of its proper divisors (1590470720).

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

1200355120 is a wasteful number, since it uses less digits than its factorization.

1200355120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15004452 (or 15004446 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 1200355120 is about 34646.1414879060. The cubic root of 1200355120 is about 1062.7633842081.

Adding to 1200355120 its reverse (215530021), we get a palindrome (1415885141).

It can be divided in two parts, 1200355 and 120, that added together give a triangular number (1200475 = T₁₅₄₉).

The spelling of 1200355120 in words is "one billion, two hundred million, three hundred fifty-five thousand, one hundred twenty".