104530721 has 4 divisors (see below), whose sum is σ = 106961712. Its totient is φ = 102099732.

The previous prime is 104530709. The next prime is 104530753. The reversal of 104530721 is 127035401.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 104530721 - 2¹⁴ = 104514337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (104533721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215431 + ... + 1215516.

It is an arithmetic number, because the mean of its divisors is an integer number (26740428).

Almost surely, 2^104530721 is an apocalyptic number.

It is an amenable number.

104530721 is a deficient number, since it is larger than the sum of its proper divisors (2430991).

104530721 is an equidigital number, since it uses as much as digits as its factorization.

104530721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2430990.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 104530721 is about 10224.0266529387. The cubic root of 104530721 is about 471.0655182980.

The spelling of 104530721 in words is "one hundred four million, five hundred thirty thousand, seven hundred twenty-one".