7123140 has 60 divisors (see below), whose sum is σ = 22350636. Its totient is φ = 1899072.

The previous prime is 7123117. The next prime is 7123159. The reversal of 7123140 is 413217.

It can be written as a sum of positive squares in 2 ways, for example, as 2985984 + 4137156 = 1728^2 + 2034^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 579 + ... + 3818.

Almost surely, 2^7123140 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 7123140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11175318).

7123140 is an abundant number, since it is smaller than the sum of its proper divisors (15227496).

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

7123140 is a wasteful number, since it uses less digits than its factorization.

7123140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418 (or 4407 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 7123140 is about 2668.9211303446. The cubic root of 7123140 is about 192.4083107508.

Adding to 7123140 its reverse (413217), we get a palindrome (7536357).

The spelling of 7123140 in words is "seven million, one hundred twenty-three thousand, one hundred forty".