1200542120 has 16 divisors (see below), whose sum is σ = 2701219860. Its totient is φ = 480216832.

The previous prime is 1200542117. The next prime is 1200542141. The reversal of 1200542120 is 212450021.

It can be written as a sum of positive squares in 2 ways, for example, as 1077021124 + 123520996 = 32818^2 + 11114^2 .

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, 15006737 + ... + 15006816.

Almost surely, 2^1200542120 is an apocalyptic number.

1200542120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200542120 is an abundant number, since it is smaller than the sum of its proper divisors (1500677740).

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

1200542120 is a wasteful number, since it uses less digits than its factorization.

1200542120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30013564 (or 30013560 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1200542120 is about 34648.8400960263. The cubic root of 1200542120 is about 1062.8185696639.

Adding to 1200542120 its reverse (212450021), we get a palindrome (1412992141).

The spelling of 1200542120 in words is "one billion, two hundred million, five hundred forty-two thousand, one hundred twenty".