7128957 has 24 divisors (see below), whose sum is σ = 10725120. Its totient is φ = 4206400.

The previous prime is 7128949. The next prime is 7128973. The reversal of 7128957 is 7598217.

It is not a de Polignac number, because 7128957 - 2³ = 7128949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7128907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14644 + ... + 15122.

It is an arithmetic number, because the mean of its divisors is an integer number (446880).

Almost surely, 2^7128957 is an apocalyptic number.

It is an amenable number.

7128957 is a deficient number, since it is larger than the sum of its proper divisors (3596163).

7128957 is a wasteful number, since it uses less digits than its factorization.

7128957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 534 counting only the distinct ones).

The product of its digits is 35280, while the sum is 39.

The square root of 7128957 is about 2670.0106741360. The cubic root of 7128957 is about 192.4606722380.

It can be divided in two parts, 712 and 8957, that added together give a palindrome (9669).

The spelling of 7128957 in words is "seven million, one hundred twenty-eight thousand, nine hundred fifty-seven".