30142443 has 16 divisors (see below), whose sum is σ = 42082560. Its totient is φ = 19154784.

The previous prime is 30142439. The next prime is 30142477. The reversal of 30142443 is 34424103.

It is not a de Polignac number, because 30142443 - 2² = 30142439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30142403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26280 + ... + 27402.

It is an arithmetic number, because the mean of its divisors is an integer number (2630160).

Almost surely, 2^30142443 is an apocalyptic number.

30142443 is a deficient number, since it is larger than the sum of its proper divisors (11940117).

30142443 is a wasteful number, since it uses less digits than its factorization.

30142443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1538.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 30142443 is about 5490.2133838313. The cubic root of 30142443 is about 311.2142559879.

Adding to 30142443 its reverse (34424103), we get a palindrome (64566546).

The spelling of 30142443 in words is "thirty million, one hundred forty-two thousand, four hundred forty-three".