7128315 has 12 divisors (see below), whose sum is σ = 12355824. Its totient is φ = 3801744.

The previous prime is 7128307. The next prime is 7128347. The reversal of 7128315 is 5138217.

It is not a de Polignac number, because 7128315 - 2³ = 7128307 is a prime.

7128315 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79159 + ... + 79248.

It is an arithmetic number, because the mean of its divisors is an integer number (1029652).

Almost surely, 2^7128315 is an apocalyptic number.

7128315 is a deficient number, since it is larger than the sum of its proper divisors (5227509).

7128315 is a wasteful number, since it uses less digits than its factorization.

7128315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158418 (or 158415 counting only the distinct ones).

The product of its digits is 1680, while the sum is 27.

The square root of 7128315 is about 2669.8904471907. The cubic root of 7128315 is about 192.4548946999.

The spelling of 7128315 in words is "seven million, one hundred twenty-eight thousand, three hundred fifteen".