7105128 has 16 divisors (see below), whose sum is σ = 17762880. Its totient is φ = 2368368.

The previous prime is 7105117. The next prime is 7105129. The reversal of 7105128 is 8215017.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 296047 = 7105128 / (7 + 1 + 0 + 5 + 1 + 2 + 8).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7105098 and 7105107.

It is not an unprimeable number, because it can be changed into a prime (7105129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148000 + ... + 148047.

It is an arithmetic number, because the mean of its divisors is an integer number (1110180).

Almost surely, 2^7105128 is an apocalyptic number.

It is an amenable number.

7105128 is an abundant number, since it is smaller than the sum of its proper divisors (10657752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7105128 is a wasteful number, since it uses less digits than its factorization.

7105128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296056 (or 296052 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 24.

The square root of 7105128 is about 2665.5445972634. The cubic root of 7105128 is about 192.2459954534.

The spelling of 7105128 in words is "seven million, one hundred five thousand, one hundred twenty-eight".