1200541550 has 48 divisors (see below), whose sum is σ = 2428719552. Its totient is φ = 438864000.

The previous prime is 1200541523. The next prime is 1200541571. The reversal of 1200541550 is 551450021.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56507 + ... + 74793.

It is an arithmetic number, because the mean of its divisors is an integer number (50598324).

Almost surely, 2^1200541550 is an apocalyptic number.

1200541550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1200541550 is an abundant number, since it is smaller than the sum of its proper divisors (1228178002).

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

1200541550 is a wasteful number, since it uses less digits than its factorization.

1200541550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18413 (or 18408 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 1200541550 is about 34648.8318706418. The cubic root of 1200541550 is about 1062.8184014603.

Adding to 1200541550 its reverse (551450021), we get a palindrome (1751991571).

The spelling of 1200541550 in words is "one billion, two hundred million, five hundred forty-one thousand, five hundred fifty".