34720321 has 4 divisors (see below), whose sum is σ = 34973892. Its totient is φ = 34466752.

The previous prime is 34720313. The next prime is 34720327. The reversal of 34720321 is 12302743.

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 19228225 + 15492096 = 4385^2 + 3936^2 .

It is a cyclic number.

It is not a de Polignac number, because 34720321 - 2³ = 34720313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 34720292 and 34720301.

It is not an unprimeable number, because it can be changed into a prime (34720327) 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, 126580 + ... + 126853.

It is an arithmetic number, because the mean of its divisors is an integer number (8743473).

Almost surely, 2^34720321 is an apocalyptic number.

It is an amenable number.

34720321 is a deficient number, since it is larger than the sum of its proper divisors (253571).

34720321 is a wasteful number, since it uses less digits than its factorization.

34720321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253570.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 34720321 is about 5892.3951836244. The cubic root of 34720321 is about 326.2330155620.

The spelling of 34720321 in words is "thirty-four million, seven hundred twenty thousand, three hundred twenty-one".