128485001 has 2 divisors, whose sum is σ = 128485002. Its totient is φ = 128485000.

The previous prime is 128484991. The next prime is 128485003. The reversal of 128485001 is 100584821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72250000 + 56235001 = 8500^2 + 7499^2 .

It is a cyclic number.

It is not a de Polignac number, because 128485001 - 2¹⁴ = 128468617 is a prime.

Together with 128485003, 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 (128485003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64242500 + 64242501.

It is an arithmetic number, because the mean of its divisors is an integer number (64242501).

Almost surely, 2^128485001 is an apocalyptic number.

It is an amenable number.

128485001 is a deficient number, since it is larger than the sum of its proper divisors (1).

128485001 is an equidigital number, since it uses as much as digits as its factorization.

128485001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 128485001 is about 11335.1224519191. The cubic root of 128485001 is about 504.6041416276.

The spelling of 128485001 in words is "one hundred twenty-eight million, four hundred eighty-five thousand, one".