730320121 has 4 divisors (see below), whose sum is σ = 742292644. Its totient is φ = 718347600.

The previous prime is 730320089. The next prime is 730320181. The reversal of 730320121 is 121023037.

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

It can be written as a sum of positive squares in 2 ways, for example, as 45765225 + 684554896 = 6765^2 + 26164^2 .

It is a cyclic number.

It is not a de Polignac number, because 730320121 - 2⁵ = 730320089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (730320181) 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, 5986170 + ... + 5986291.

It is an arithmetic number, because the mean of its divisors is an integer number (185573161).

Almost surely, 2^730320121 is an apocalyptic number.

It is an amenable number.

730320121 is a deficient number, since it is larger than the sum of its proper divisors (11972523).

730320121 is a wasteful number, since it uses less digits than its factorization.

730320121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11972522.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 730320121 is about 27024.4356277795. The cubic root of 730320121 is about 900.5429320769.

Adding to 730320121 its reverse (121023037), we get a palindrome (851343158).

The spelling of 730320121 in words is "seven hundred thirty million, three hundred twenty thousand, one hundred twenty-one".