30034721 has 4 divisors (see below), whose sum is σ = 30045744. Its totient is φ = 30023700.

The previous prime is 30034709. The next prime is 30034723. The reversal of 30034721 is 12743003.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 30034721 - 2¹⁸ = 29772577 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30034693 and 30034702.

It is not an unprimeable number, because it can be changed into a prime (30034723) 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, 1886 + ... + 7976.

It is an arithmetic number, because the mean of its divisors is an integer number (7511436).

Almost surely, 2^30034721 is an apocalyptic number.

It is an amenable number.

30034721 is a deficient number, since it is larger than the sum of its proper divisors (11023).

30034721 is an equidigital number, since it uses as much as digits as its factorization.

30034721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11022.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 30034721 is about 5480.3942376439. The cubic root of 30034721 is about 310.8430779568.

Adding to 30034721 its reverse (12743003), we get a palindrome (42777724).

The spelling of 30034721 in words is "thirty million, thirty-four thousand, seven hundred twenty-one".