128750002 has 4 divisors (see below), whose sum is σ = 193125006. Its totient is φ = 64375000.

The previous prime is 128749987. The next prime is 128750003. The reversal of 128750002 is 200057821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 123232201 + 5517801 = 11101^2 + 2349^2 .

It is not an unprimeable number, because it can be changed into a prime (128750003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32187499 + ... + 32187502.

Almost surely, 2^128750002 is an apocalyptic number.

128750002 is a deficient number, since it is larger than the sum of its proper divisors (64375004).

128750002 is an equidigital number, since it uses as much as digits as its factorization.

128750002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64375003.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 128750002 is about 11346.8058060407. The cubic root of 128750002 is about 504.9508196396.

The spelling of 128750002 in words is "one hundred twenty-eight million, seven hundred fifty thousand, two".