30021124 has 36 divisors (see below), whose sum is σ = 61837020. Its totient is φ = 12714240.

The previous prime is 30021091. The next prime is 30021137. The reversal of 30021124 is 42112003.

It can be written as a sum of positive squares in 2 ways, for example, as 13764100 + 16257024 = 3710^2 + 4032^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16584 + ... + 18304.

It is an arithmetic number, because the mean of its divisors is an integer number (1717695).

Almost surely, 2^30021124 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30021124, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30918510).

30021124 is an abundant number, since it is smaller than the sum of its proper divisors (31815896).

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

30021124 is a wasteful number, since it uses less digits than its factorization.

30021124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1828 (or 1819 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 30021124 is about 5479.1535842683. The cubic root of 30021124 is about 310.7961636839.

Adding to 30021124 its reverse (42112003), we get a palindrome (72133127).

The spelling of 30021124 in words is "thirty million, twenty-one thousand, one hundred twenty-four".