128272995 has 12 divisors (see below), whose sum is σ = 222339936. Its totient is φ = 68412240.

The previous prime is 128272993. The next prime is 128272997. The reversal of 128272995 is 599272821.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (128272993) and next prime (128272997).

It is not a de Polignac number, because 128272995 - 2¹ = 128272993 is a prime.

It is a super-2 number, since 2×128272995² = 32907922492540050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 2850511 = 128272995 / (1 + 2 + 8 + 2 + 7 + 2 + 9 + 9 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 128272995.

It is not an unprimeable number, because it can be changed into a prime (128272993) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1425211 + ... + 1425300.

It is an arithmetic number, because the mean of its divisors is an integer number (18528328).

Almost surely, 2^128272995 is an apocalyptic number.

128272995 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128272995 is a deficient number, since it is larger than the sum of its proper divisors (94066941).

128272995 is a wasteful number, since it uses less digits than its factorization.

128272995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850522 (or 2850519 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 128272995 is about 11325.7668614536. The cubic root of 128272995 is about 504.3264490333.

The spelling of 128272995 in words is "one hundred twenty-eight million, two hundred seventy-two thousand, nine hundred ninety-five".