128500003 has 2 divisors, whose sum is σ = 128500004. Its totient is φ = 128500002.

The previous prime is 128499971. The next prime is 128500007. The reversal of 128500003 is 300005821.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (300005821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128500003 - 2⁵ = 128499971 is a prime.

It is not a weakly prime, because it can be changed into another prime (128500007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64250001 + 64250002.

It is an arithmetic number, because the mean of its divisors is an integer number (64250002).

Almost surely, 2^128500003 is an apocalyptic number.

128500003 is a deficient number, since it is larger than the sum of its proper divisors (1).

128500003 is an equidigital number, since it uses as much as digits as its factorization.

128500003 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 128500003 is about 11335.7841810790. The cubic root of 128500003 is about 504.6237801759.

Adding to 128500003 its reverse (300005821), we get a palindrome (428505824).

The spelling of 128500003 in words is "one hundred twenty-eight million, five hundred thousand, three".