1200012720 has 80 divisors (see below), whose sum is σ = 3724261632. Its totient is φ = 319640320.

The previous prime is 1200012707. The next prime is 1200012731. The reversal of 1200012720 is 272100021.

1200012720 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1200012720.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 259549 + ... + 264131.

Almost surely, 2^1200012720 is an apocalyptic number.

1200012720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200012720 is an abundant number, since it is smaller than the sum of its proper divisors (2524248912).

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

1200012720 is a wasteful number, since it uses less digits than its factorization.

1200012720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690 (or 5684 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 1200012720 is about 34641.1997482766. The cubic root of 1200012720 is about 1062.6623238963.

Adding to 1200012720 its reverse (272100021), we get a palindrome (1472112741).

The spelling of 1200012720 in words is "one billion, two hundred million, twelve thousand, seven hundred twenty".