30265921 has 8 divisors (see below), whose sum is σ = 34907840. Its totient is φ = 25703568.

The previous prime is 30265919. The next prime is 30265931. The reversal of 30265921 is 12956203.

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 30265921 - 2¹ = 30265919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30265921.

It is not an unprimeable number, because it can be changed into a prime (30265901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19071 + ... + 20596.

It is an arithmetic number, because the mean of its divisors is an integer number (4363480).

Almost surely, 2^30265921 is an apocalyptic number.

It is an amenable number.

30265921 is a deficient number, since it is larger than the sum of its proper divisors (4641919).

30265921 is a wasteful number, since it uses less digits than its factorization.

30265921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39783.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 30265921 is about 5501.4471732445. The cubic root of 30265921 is about 311.6386383074.

The spelling of 30265921 in words is "thirty million, two hundred sixty-five thousand, nine hundred twenty-one".