128702265 has 8 divisors (see below), whose sum is σ = 205923648. Its totient is φ = 68641200.

The previous prime is 128702263. The next prime is 128702269. The reversal of 128702265 is 562207821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 128702265 - 2¹ = 128702263 is a prime.

It is a super-2 number, since 2×128702265² = 33128546032260450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (128702263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4290061 + ... + 4290090.

It is an arithmetic number, because the mean of its divisors is an integer number (25740456).

Almost surely, 2^128702265 is an apocalyptic number.

128702265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128702265 is a deficient number, since it is larger than the sum of its proper divisors (77221383).

128702265 is an equidigital number, since it uses as much as digits as its factorization.

128702265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8580159.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 128702265 is about 11344.7020674851. The cubic root of 128702265 is about 504.8884045803. Note that the first 3 decimals are identical.

The spelling of 128702265 in words is "one hundred twenty-eight million, seven hundred two thousand, two hundred sixty-five".