730123 has 4 divisors (see below), whose sum is σ = 736000. Its totient is φ = 724248.

The previous prime is 730111. The next prime is 730139. The reversal of 730123 is 321037.

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 730123 - 2⁵ = 730091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 730097 and 730106.

It is not an unprimeable number, because it can be changed into a prime (730823) 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, 2748 + ... + 3001.

It is an arithmetic number, because the mean of its divisors is an integer number (184000).

2⁷³⁰¹²³ is an apocalyptic number.

730123 is a deficient number, since it is larger than the sum of its proper divisors (5877).

730123 is a wasteful number, since it uses less digits than its factorization.

730123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5876.

The product of its (nonzero) digits is 126, while the sum is 16.

The square root of 730123 is about 854.4723518055. The cubic root of 730123 is about 90.0461902817.

The spelling of 730123 in words is "seven hundred thirty thousand, one hundred twenty-three".