30142543 has 2 divisors, whose sum is σ = 30142544. Its totient is φ = 30142542.

The previous prime is 30142507. The next prime is 30142549. The reversal of 30142543 is 34524103.

It is a strong prime.

It is an emirp because it is prime and its reverse (34524103) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30142543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30142549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15071271 + 15071272.

It is an arithmetic number, because the mean of its divisors is an integer number (15071272).

Almost surely, 2^30142543 is an apocalyptic number.

30142543 is a deficient number, since it is larger than the sum of its proper divisors (1).

30142543 is an equidigital number, since it uses as much as digits as its factorization.

30142543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 30142543 is about 5490.2224909379. Note that the first 3 decimals coincide. The cubic root of 30142543 is about 311.2146001470.

Adding to 30142543 its reverse (34524103), we get a palindrome (64666646).

The spelling of 30142543 in words is "thirty million, one hundred forty-two thousand, five hundred forty-three".