30121284 has 12 divisors (see below), whose sum is σ = 70283024. Its totient is φ = 10040424.

The previous prime is 30121271. The next prime is 30121303. The reversal of 30121284 is 48212103.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 30121284.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1255042 + ... + 1255065.

Almost surely, 2^30121284 is an apocalyptic number.

It is an amenable number.

30121284 is an abundant number, since it is smaller than the sum of its proper divisors (40161740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30121284 is a wasteful number, since it uses less digits than its factorization.

30121284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2510114 (or 2510112 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 30121284 is about 5488.2860712612. The cubic root of 30121284 is about 311.1414182304.

Adding to 30121284 its reverse (48212103), we get a palindrome (78333387).

The spelling of 30121284 in words is "thirty million, one hundred twenty-one thousand, two hundred eighty-four".