30142143 has 6 divisors (see below), whose sum is σ = 43538664. Its totient is φ = 20094756.

The previous prime is 30142129. The next prime is 30142153. The reversal of 30142143 is 34124103.

It is not a de Polignac number, because 30142143 - 2⁸ = 30141887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30142103) 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 5 ways as a sum of consecutive naturals, for example, 1674555 + ... + 1674572.

It is an arithmetic number, because the mean of its divisors is an integer number (7256444).

Almost surely, 2^30142143 is an apocalyptic number.

30142143 is a deficient number, since it is larger than the sum of its proper divisors (13396521).

30142143 is a wasteful number, since it uses less digits than its factorization.

30142143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349133 (or 3349130 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 30142143 is about 5490.1860624208. The cubic root of 30142143 is about 311.2132235059.

Adding to 30142143 its reverse (34124103), we get a palindrome (64266246).

The spelling of 30142143 in words is "thirty million, one hundred forty-two thousand, one hundred forty-three".