1200000447500 has 60 divisors (see below), whose sum is σ = 2738255065392. Its totient is φ = 459130584000.

The previous prime is 1200000447439. The next prime is 1200000447509. The reversal of 1200000447500 is 57440000021.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (1200000447509) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 10377287 + ... + 10492286.

Almost surely, 2^{1200000447500} is an apocalyptic number.

1200000447500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200000447500 is an abundant number, since it is smaller than the sum of its proper divisors (1538254617892).

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

1200000447500 is a wasteful number, since it uses less digits than its factorization.

1200000447500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20869620 (or 20869603 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

Adding to 1200000447500 its reverse (57440000021), we get a palindrome (1257440447521).

The spelling of 1200000447500 in words is "one trillion, two hundred billion, four hundred forty-seven thousand, five hundred".