30021065 has 16 divisors (see below), whose sum is σ = 38413440. Its totient is φ = 22444800.

The previous prime is 30021059. The next prime is 30021067. The reversal of 30021065 is 56012003.

It is not a de Polignac number, because 30021065 - 2¹⁰ = 30020041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (30021067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11666 + ... + 14004.

It is an arithmetic number, because the mean of its divisors is an integer number (2400840).

Almost surely, 2^30021065 is an apocalyptic number.

It is an amenable number.

30021065 is a deficient number, since it is larger than the sum of its proper divisors (8392375).

30021065 is a wasteful number, since it uses less digits than its factorization.

30021065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2512.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 30021065 is about 5479.1482002224. The cubic root of 30021065 is about 310.7959600830.

Adding to 30021065 its reverse (56012003), we get a palindrome (86033068).

The spelling of 30021065 in words is "thirty million, twenty-one thousand, sixty-five".