7128147 has 8 divisors (see below), whose sum is σ = 10235344. Its totient is φ = 4386528.

The previous prime is 7128139. The next prime is 7128167. The reversal of 7128147 is 7418217.

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

It is not a de Polignac number, because 7128147 - 2³ = 7128139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7128167) 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 7 ways as a sum of consecutive naturals, for example, 91348 + ... + 91425.

It is an arithmetic number, because the mean of its divisors is an integer number (1279418).

Almost surely, 2^7128147 is an apocalyptic number.

7128147 is a deficient number, since it is larger than the sum of its proper divisors (3107197).

7128147 is a wasteful number, since it uses less digits than its factorization.

7128147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182789.

The product of its digits is 3136, while the sum is 30.

The square root of 7128147 is about 2669.8589850402. The cubic root of 7128147 is about 192.4533827636.

The spelling of 7128147 in words is "seven million, one hundred twenty-eight thousand, one hundred forty-seven".