34012721 has 4 divisors (see below), whose sum is σ = 34221552. Its totient is φ = 33803892.

The previous prime is 34012711. The next prime is 34012729. The reversal of 34012721 is 12721043.

34012721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 34012721 - 2¹⁰ = 34011697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 34012693 and 34012702.

It is not an unprimeable number, because it can be changed into a prime (34012729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104171 + ... + 104496.

It is an arithmetic number, because the mean of its divisors is an integer number (8555388).

Almost surely, 2^34012721 is an apocalyptic number.

It is an amenable number.

34012721 is a deficient number, since it is larger than the sum of its proper divisors (208831).

34012721 is a wasteful number, since it uses less digits than its factorization.

34012721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208830.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 34012721 is about 5832.0426095837. The cubic root of 34012721 is about 324.0015781308.

Adding to 34012721 its reverse (12721043), we get a palindrome (46733764).

The spelling of 34012721 in words is "thirty-four million, twelve thousand, seven hundred twenty-one".