128602871 has 2 divisors, whose sum is σ = 128602872. Its totient is φ = 128602870.

The previous prime is 128602847. The next prime is 128602879. The reversal of 128602871 is 178206821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128602871 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128602879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64301435 + 64301436.

It is an arithmetic number, because the mean of its divisors is an integer number (64301436).

Almost surely, 2^128602871 is an apocalyptic number.

128602871 is a deficient number, since it is larger than the sum of its proper divisors (1).

128602871 is an equidigital number, since it uses as much as digits as its factorization.

128602871 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 128602871 is about 11340.3205862974. The cubic root of 128602871 is about 504.7583996110.

The spelling of 128602871 in words is "one hundred twenty-eight million, six hundred two thousand, eight hundred seventy-one".