30145145 has 4 divisors (see below), whose sum is σ = 36174180. Its totient is φ = 24116112.

The previous prime is 30145139. The next prime is 30145147. The reversal of 30145145 is 54154103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54154103 = 643 ⋅84221.

It can be written as a sum of positive squares in 2 ways, for example, as 13920361 + 16224784 = 3731^2 + 4028^2 .

It is a cyclic number.

It is not a de Polignac number, because 30145145 - 2⁶ = 30145081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30145145.

It is not an unprimeable number, because it can be changed into a prime (30145147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3014510 + ... + 3014519.

It is an arithmetic number, because the mean of its divisors is an integer number (9043545).

Almost surely, 2^30145145 is an apocalyptic number.

It is an amenable number.

30145145 is a deficient number, since it is larger than the sum of its proper divisors (6029035).

30145145 is an equidigital number, since it uses as much as digits as its factorization.

30145145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6029034.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 30145145 is about 5490.4594525413. The cubic root of 30145145 is about 311.2235549001.

Adding to 30145145 its reverse (54154103), we get a palindrome (84299248).

The spelling of 30145145 in words is "thirty million, one hundred forty-five thousand, one hundred forty-five".