7161128 has 32 divisors (see below), whose sum is σ = 14858760. Its totient is φ = 3214080.

The previous prime is 7161109. The next prime is 7161137. The reversal of 7161128 is 8211617.

It can be written as a sum of positive squares in 4 ways, for example, as 3928324 + 3232804 = 1982^2 + 1798^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a junction number, because it is equal to n+sod(n) for n = 7161097 and 7161106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2918 + ... + 4778.

Almost surely, 2^7161128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7161128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7429380).

7161128 is an abundant number, since it is smaller than the sum of its proper divisors (7697632).

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

7161128 is a wasteful number, since it uses less digits than its factorization.

7161128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1917 (or 1913 counting only the distinct ones).

The product of its digits is 672, while the sum is 26.

The square root of 7161128 is about 2676.0284004472. The cubic root of 7161128 is about 192.7497449982.

The spelling of 7161128 in words is "seven million, one hundred sixty-one thousand, one hundred twenty-eight".