30122005 has 4 divisors (see below), whose sum is σ = 36146412. Its totient is φ = 24097600.

The previous prime is 30121999. The next prime is 30122017. The reversal of 30122005 is 50022103.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50022103 = 1097 ⋅45599.

It can be written as a sum of positive squares in 2 ways, for example, as 3175524 + 26946481 = 1782^2 + 5191^2 .

It is not a de Polignac number, because 30122005 - 2³ = 30121997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3012196 + ... + 3012205.

It is an arithmetic number, because the mean of its divisors is an integer number (9036603).

Almost surely, 2^30122005 is an apocalyptic number.

It is an amenable number.

30122005 is a deficient number, since it is larger than the sum of its proper divisors (6024407).

30122005 is an equidigital number, since it uses as much as digits as its factorization.

30122005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6024406.

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

The square root of 30122005 is about 5488.3517562197. The cubic root of 30122005 is about 311.1439007626.

Adding to 30122005 its reverse (50022103), we get a palindrome (80144108).

The spelling of 30122005 in words is "thirty million, one hundred twenty-two thousand, five".