30305121 has 32 divisors (see below), whose sum is σ = 50823168. Its totient is φ = 15603840.

The previous prime is 30305069. The next prime is 30305129. The reversal of 30305121 is 12150303.

It is a happy number.

It is not a de Polignac number, because 30305121 - 2⁷ = 30304993 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 30305121.

It is not an unprimeable number, because it can be changed into a prime (30305129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28821 + ... + 29853.

It is an arithmetic number, because the mean of its divisors is an integer number (1588224).

Almost surely, 2^30305121 is an apocalyptic number.

It is an amenable number.

30305121 is a deficient number, since it is larger than the sum of its proper divisors (20518047).

30305121 is a wasteful number, since it uses less digits than its factorization.

30305121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181.

The product of its (nonzero) digits is 90, while the sum is 15.

The square root of 30305121 is about 5505.0087193391. The cubic root of 30305121 is about 311.7731236065.

Adding to 30305121 its reverse (12150303), we get a palindrome (42455424).

The spelling of 30305121 in words is "thirty million, three hundred five thousand, one hundred twenty-one".