128539001 has 2 divisors, whose sum is σ = 128539002. Its totient is φ = 128539000.

The previous prime is 128538979. The next prime is 128539003. The reversal of 128539001 is 100935821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111851776 + 16687225 = 10576^2 + 4085^2 .

It is a cyclic number.

It is not a de Polignac number, because 128539001 - 2¹⁴ = 128522617 is a prime.

Together with 128539003, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (128539003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64269500 + 64269501.

It is an arithmetic number, because the mean of its divisors is an integer number (64269501).

Almost surely, 2^128539001 is an apocalyptic number.

It is an amenable number.

128539001 is a deficient number, since it is larger than the sum of its proper divisors (1).

128539001 is an equidigital number, since it uses as much as digits as its factorization.

128539001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 128539001 is about 11337.5041786100. The cubic root of 128539001 is about 504.6748238264.

The spelling of 128539001 in words is "one hundred twenty-eight million, five hundred thirty-nine thousand, one".