7123120 has 40 divisors (see below), whose sum is σ = 16673040. Its totient is φ = 2830080.

The previous prime is 7123117. The next prime is 7123159. The reversal of 7123120 is 213217.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 7123094 and 7123103.

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, 21355 + ... + 21685.

It is an arithmetic number, because the mean of its divisors is an integer number (416826).

Almost surely, 2^7123120 is an apocalyptic number.

It is an amenable number.

7123120 is an abundant number, since it is smaller than the sum of its proper divisors (9549920).

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

7123120 is a wasteful number, since it uses less digits than its factorization.

7123120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 7123120 is about 2668.9173835097. The cubic root of 7123120 is about 192.4081306724.

Adding to 7123120 its reverse (213217), we get a palindrome (7336337).

Subtracting from 7123120 its reverse (213217), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 7123120 in words is "seven million, one hundred twenty-three thousand, one hundred twenty".