730121 has 8 divisors (see below), whose sum is σ = 857280. Its totient is φ = 608688.

The previous prime is 730111. The next prime is 730139. The reversal of 730121 is 121037.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 730121 - 2¹⁴ = 713737 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 730096 and 730105.

It is not an unprimeable number, because it can be changed into a prime (730111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1151 + ... + 1668.

It is an arithmetic number, because the mean of its divisors is an integer number (107160).

2⁷³⁰¹²¹ is an apocalyptic number.

It is an amenable number.

730121 is a deficient number, since it is larger than the sum of its proper divisors (127159).

730121 is a wasteful number, since it uses less digits than its factorization.

730121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2863.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 730121 is about 854.4711814918. The cubic root of 730121 is about 90.0461080615.

Adding to 730121 its reverse (121037), we get a palindrome (851158).

The spelling of 730121 in words is "seven hundred thirty thousand, one hundred twenty-one".