30390145 has 4 divisors (see below), whose sum is σ = 36468180. Its totient is φ = 24312112.

The previous prime is 30390131. The next prime is 30390161. The reversal of 30390145 is 54109303.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54109303 = 2731 ⋅19813.

It can be written as a sum of positive squares in 2 ways, for example, as 5798464 + 24591681 = 2408^2 + 4959^2 .

It is a cyclic number.

It is not a de Polignac number, because 30390145 - 2¹¹ = 30388097 is a prime.

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, 3039010 + ... + 3039019.

It is an arithmetic number, because the mean of its divisors is an integer number (9117045).

Almost surely, 2^30390145 is an apocalyptic number.

It is an amenable number.

30390145 is a deficient number, since it is larger than the sum of its proper divisors (6078035).

30390145 is an equidigital number, since it uses as much as digits as its factorization.

30390145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6078034.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 30390145 is about 5512.7257323397. The cubic root of 30390145 is about 312.0644214169.

Adding to 30390145 its reverse (54109303), we get a palindrome (84499448).

The spelling of 30390145 in words is "thirty million, three hundred ninety thousand, one hundred forty-five".