7123 has 4 divisors (see below), whose sum is σ = 7560. Its totient is φ = 6688.

The previous prime is 7121. The next prime is 7127. The reversal of 7123 is 3217.

7123 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 7123 - 2¹ = 7121 is a prime.

It is a d-powerful number, because it can be written as 7² + 2⁹ + 1 + 3⁸ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193 + ... + 226.

It is an arithmetic number, because the mean of its divisors is an integer number (1890).

2⁷¹²³ is an apocalyptic number.

7123 is a deficient number, since it is larger than the sum of its proper divisors (437).

7123 is a wasteful number, since it uses less digits than its factorization.

7123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its digits is 42, while the sum is 13.

The square root of 7123 is about 84.3978672716. The cubic root of 7123 is about 19.2407050195.

It can be divided in two parts, 7 and 123, that multiplied together give a triangular number (861 = T₄₁).

The spelling of 7123 in words is "seven thousand, one hundred twenty-three", and thus it is an iban number.