128429065 has 4 divisors (see below), whose sum is σ = 154114884. Its totient is φ = 102743248.

The previous prime is 128429039. The next prime is 128429087. The reversal of 128429065 is 560924821.

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

It can be written as a sum of positive squares in 2 ways, for example, as 86787856 + 41641209 = 9316^2 + 6453^2 .

It is a cyclic number.

It is not a de Polignac number, because 128429065 - 2¹⁷ = 128297993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12842902 + ... + 12842911.

It is an arithmetic number, because the mean of its divisors is an integer number (38528721).

Almost surely, 2^128429065 is an apocalyptic number.

It is an amenable number.

128429065 is a deficient number, since it is larger than the sum of its proper divisors (25685819).

128429065 is an equidigital number, since it uses as much as digits as its factorization.

128429065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25685818.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 128429065 is about 11332.6548081198. The cubic root of 128429065 is about 504.5309044558.

The spelling of 128429065 in words is "one hundred twenty-eight million, four hundred twenty-nine thousand, sixty-five".