30725321 has 8 divisors (see below), whose sum is σ = 33991488. Its totient is φ = 27538000.

The previous prime is 30725291. The next prime is 30725333. The reversal of 30725321 is 12352703.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30725321 - 2²² = 26531017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30725351) 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 7 ways as a sum of consecutive naturals, for example, 18890 + ... + 20451.

It is an arithmetic number, because the mean of its divisors is an integer number (4248936).

Almost surely, 2^30725321 is an apocalyptic number.

It is an amenable number.

30725321 is a deficient number, since it is larger than the sum of its proper divisors (3266167).

30725321 is a wasteful number, since it uses less digits than its factorization.

30725321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39423.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 30725321 is about 5543.0425760587. The cubic root of 30725321 is about 313.2074927242.

The spelling of 30725321 in words is "thirty million, seven hundred twenty-five thousand, three hundred twenty-one".