30075021 has 6 divisors (see below), whose sum is σ = 43441710. Its totient is φ = 20050008.

The previous prime is 30075011. The next prime is 30075041. The reversal of 30075021 is 12057003.

It can be written as a sum of positive squares in only one way, i.e., 16281225 + 13793796 = 4035^2 + 3714^2 .

It is not a de Polignac number, because 30075021 - 2⁹ = 30074509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30074985 and 30075003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30075011) 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 5 ways as a sum of consecutive naturals, for example, 1670826 + ... + 1670843.

It is an arithmetic number, because the mean of its divisors is an integer number (7240285).

Almost surely, 2^30075021 is an apocalyptic number.

It is an amenable number.

30075021 is a deficient number, since it is larger than the sum of its proper divisors (13366689).

30075021 is a wasteful number, since it uses less digits than its factorization.

30075021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3341675 (or 3341672 counting only the distinct ones).

The product of its (nonzero) digits is 210, while the sum is 18.

The square root of 30075021 is about 5484.0697479153. The cubic root of 30075021 is about 310.9820435382.

The spelling of 30075021 in words is "thirty million, seventy-five thousand, twenty-one".