7128955 has 4 divisors (see below), whose sum is σ = 8554752. Its totient is φ = 5703160.

The previous prime is 7128949. The next prime is 7128973. The reversal of 7128955 is 5598217.

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

It is not a de Polignac number, because 7128955 - 2¹⁹ = 6604667 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, 712891 + ... + 712900.

It is an arithmetic number, because the mean of its divisors is an integer number (2138688).

Almost surely, 2^7128955 is an apocalyptic number.

7128955 is a deficient number, since it is larger than the sum of its proper divisors (1425797).

7128955 is a wasteful number, since it uses less digits than its factorization.

7128955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425796.

The product of its digits is 25200, while the sum is 37.

The square root of 7128955 is about 2670.0102996056. The cubic root of 7128955 is about 192.4606542400.

The spelling of 7128955 in words is "seven million, one hundred twenty-eight thousand, nine hundred fifty-five".