1200045132 has 240 divisors, whose sum is σ = 3756614400. Its totient is φ = 329235840.

The previous prime is 1200045109. The next prime is 1200045137. The reversal of 1200045132 is 2315400021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1200045137) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2733369 + ... + 2733807.

It is an arithmetic number, because the mean of its divisors is an integer number (15652560).

Almost surely, 2^1200045132 is an apocalyptic number.

1200045132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200045132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878307200).

1200045132 is an abundant number, since it is smaller than the sum of its proper divisors (2556569268).

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

1200045132 is a wasteful number, since it uses less digits than its factorization.

1200045132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1200045132 is about 34641.6675695614. The cubic root of 1200045132 is about 1062.6718912119.

Adding to 1200045132 its reverse (2315400021), we get a palindrome (3515445153).

The spelling of 1200045132 in words is "one billion, two hundred million, forty-five thousand, one hundred thirty-two".