30642043 has 4 divisors (see below), whose sum is σ = 31630528. Its totient is φ = 29653560.

The previous prime is 30642037. The next prime is 30642083. The reversal of 30642043 is 34024603.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30642043 - 2⁵ = 30642011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30642083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494196 + ... + 494257.

It is an arithmetic number, because the mean of its divisors is an integer number (7907632).

Almost surely, 2^30642043 is an apocalyptic number.

30642043 is a deficient number, since it is larger than the sum of its proper divisors (988485).

30642043 is an equidigital number, since it uses as much as digits as its factorization.

30642043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988484.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 30642043 is about 5535.5255396394. The cubic root of 30642043 is about 312.9242638466.

Adding to 30642043 its reverse (34024603), we get a palindrome (64666646).

The spelling of 30642043 in words is "thirty million, six hundred forty-two thousand, forty-three".