1200185452 has 6 divisors (see below), whose sum is σ = 2100324548. Its totient is φ = 600092724.

The previous prime is 1200185449. The next prime is 1200185453. The reversal of 1200185452 is 2545810021.

It is a self number, because there is not a number n which added to its sum of digits gives 1200185452.

It is not an unprimeable number, because it can be changed into a prime (1200185453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 150023178 + ... + 150023185.

Almost surely, 2^1200185452 is an apocalyptic number.

It is an amenable number.

1200185452 is a deficient number, since it is larger than the sum of its proper divisors (900139096).

1200185452 is a wasteful number, since it uses less digits than its factorization.

1200185452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300046367 (or 300046365 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 1200185452 is about 34643.6928170194. The cubic root of 1200185452 is about 1062.7133086287.

Adding to 1200185452 its reverse (2545810021), we get a palindrome (3745995473).

The spelling of 1200185452 in words is "one billion, two hundred million, one hundred eighty-five thousand, four hundred fifty-two".