1200045552 has 20 divisors (see below), whose sum is σ = 3100117800. Its totient is φ = 400015168.

The previous prime is 1200045547. The next prime is 1200045559. The reversal of 1200045552 is 2555400021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200045559) 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, 12500427 + ... + 12500522.

It is an arithmetic number, because the mean of its divisors is an integer number (155005890).

Almost surely, 2^1200045552 is an apocalyptic number.

1200045552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1200045552 is an abundant number, since it is smaller than the sum of its proper divisors (1900072248).

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

1200045552 is a wasteful number, since it uses less digits than its factorization.

1200045552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25000960 (or 25000954 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 1200045552 is about 34641.6736316247. The cubic root of 1200045552 is about 1062.6720151856.

Adding to 1200045552 its reverse (2555400021), we get a palindrome (3755445573).

The spelling of 1200045552 in words is "one billion, two hundred million, forty-five thousand, five hundred fifty-two".