30145 has 4 divisors (see below), whose sum is σ = 36180. Its totient is φ = 24112.

The previous prime is 30139. The next prime is 30161. The reversal of 30145 is 54103.

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 20736 + 9409 = 144^2 + 97^2 .

It is a cyclic number.

It is not a de Polignac number, because 30145 - 2³ = 30137 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3010 + ... + 3019.

It is an arithmetic number, because the mean of its divisors is an integer number (9045).

2³⁰¹⁴⁵ is an apocalyptic number.

It is an amenable number.

30145 is a deficient number, since it is larger than the sum of its proper divisors (6035).

30145 is an equidigital number, since it uses as much as digits as its factorization.

30145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6034.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 30145 is about 173.6231551378. The cubic root of 30145 is about 31.1223055898.

Adding to 30145 its reverse (54103), we get a palindrome (84248).

The spelling of 30145 in words is "thirty thousand, one hundred forty-five".