128520002 has 8 divisors (see below), whose sum is σ = 207609276. Its totient is φ = 59316912.

The previous prime is 128519999. The next prime is 128520019. The reversal of 128520002 is 200025821.

It can be written as a sum of positive squares in 2 ways, for example, as 124791241 + 3728761 = 11171^2 + 1931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2471513 + ... + 2471564.

Almost surely, 2^128520002 is an apocalyptic number.

128520002 is a deficient number, since it is larger than the sum of its proper divisors (79089274).

128520002 is a wasteful number, since it uses less digits than its factorization.

128520002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4943092.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 128520002 is about 11336.6662648241. Note that the first 3 decimals coincide. The cubic root of 128520002 is about 504.6499577304.

Adding to 128520002 its reverse (200025821), we get a palindrome (328545823).

The spelling of 128520002 in words is "one hundred twenty-eight million, five hundred twenty thousand, two".