128302205 has 4 divisors (see below), whose sum is σ = 153962652. Its totient is φ = 102641760.

The previous prime is 128302189. The next prime is 128302301. The reversal of 128302205 is 502203821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 502203821 = 7 ⋅71743403.

It can be written as a sum of positive squares in 2 ways, for example, as 79049881 + 49252324 = 8891^2 + 7018^2 .

It is not a de Polignac number, because 128302205 - 2⁴ = 128302189 is a prime.

It is a super-2 number, since 2×128302205² = 32922911615724050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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, 12830216 + ... + 12830225.

It is an arithmetic number, because the mean of its divisors is an integer number (38490663).

Almost surely, 2^128302205 is an apocalyptic number.

It is an amenable number.

128302205 is a deficient number, since it is larger than the sum of its proper divisors (25660447).

128302205 is an equidigital number, since it uses as much as digits as its factorization.

128302205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25660446.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 128302205 is about 11327.0563254537. The cubic root of 128302205 is about 504.3647274398.

The spelling of 128302205 in words is "one hundred twenty-eight million, three hundred two thousand, two hundred five".