30012145 has 4 divisors (see below), whose sum is σ = 36014580. Its totient is φ = 24009712.

The previous prime is 30012139. The next prime is 30012149. The reversal of 30012145 is 54121003.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14653584 + 15358561 = 3828^2 + 3919^2 .

It is a cyclic number.

It is not a de Polignac number, because 30012145 - 2⁹ = 30011633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30012149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3001210 + ... + 3001219.

It is an arithmetic number, because the mean of its divisors is an integer number (9003645).

Almost surely, 2^30012145 is an apocalyptic number.

It is an amenable number.

30012145 is a deficient number, since it is larger than the sum of its proper divisors (6002435).

30012145 is an equidigital number, since it uses as much as digits as its factorization.

30012145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002434.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 30012145 is about 5478.3341446100. The cubic root of 30012145 is about 310.7651753148.

Adding to 30012145 its reverse (54121003), we get a palindrome (84133148).

The spelling of 30012145 in words is "thirty million, twelve thousand, one hundred forty-five".