30442145 has 4 divisors (see below), whose sum is σ = 36530580. Its totient is φ = 24353712.

The previous prime is 30442129. The next prime is 30442177. The reversal of 30442145 is 54124403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54124403 = 491 ⋅110233.

It can be written as a sum of positive squares in 2 ways, for example, as 3775249 + 26666896 = 1943^2 + 5164^2 .

It is a cyclic number.

It is not a de Polignac number, because 30442145 - 2⁴ = 30442129 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30442145.

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, 3044210 + ... + 3044219.

It is an arithmetic number, because the mean of its divisors is an integer number (9132645).

Almost surely, 2^30442145 is an apocalyptic number.

It is an amenable number.

30442145 is a deficient number, since it is larger than the sum of its proper divisors (6088435).

30442145 is an equidigital number, since it uses as much as digits as its factorization.

30442145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088434.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 30442145 is about 5517.4400767022. The cubic root of 30442145 is about 312.2423091638.

Adding to 30442145 its reverse (54124403), we get a palindrome (84566548).

The spelling of 30442145 in words is "thirty million, four hundred forty-two thousand, one hundred forty-five".