1206520128 has 168 divisors, whose sum is σ = 3809451360. Its totient is φ = 362050560.

The previous prime is 1206520109. The next prime is 1206520151. The reversal of 1206520128 is 8210256021.

It is a happy number.

1206520128 is a `hidden beast` number, since 1 + 2 + 0 + 652 + 0 + 1 + 2 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 689751 + ... + 691497.

Almost surely, 2^1206520128 is an apocalyptic number.

1206520128 is a gapful number since it is divisible by the number (18) 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 1206520128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904725680).

1206520128 is an abundant number, since it is smaller than the sum of its proper divisors (2602931232).

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

1206520128 is a wasteful number, since it uses less digits than its factorization.

1206520128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1885 (or 1872 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1206520128 is about 34734.9986037138. The cubic root of 1206520128 is about 1064.5797244040.

Adding to 1206520128 its reverse (8210256021), we get a palindrome (9416776149).

The spelling of 1206520128 in words is "one billion, two hundred six million, five hundred twenty thousand, one hundred twenty-eight".