142730979 has 8 divisors (see below), whose sum is σ = 190374912. Its totient is φ = 95120520.

The previous prime is 142730969. The next prime is 142730999. The reversal of 142730979 is 979037241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142730979 - 2⁵ = 142730947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142730979.

It is not an unprimeable number, because it can be changed into a prime (142730909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4342 + ... + 17444.

It is an arithmetic number, because the mean of its divisors is an integer number (23796864).

Almost surely, 2^142730979 is an apocalyptic number.

142730979 is a deficient number, since it is larger than the sum of its proper divisors (47643933).

142730979 is a wasteful number, since it uses less digits than its factorization.

142730979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16737.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 142730979 is about 11947.0071147547. The cubic root of 142730979 is about 522.6040225422.

The spelling of 142730979 in words is "one hundred forty-two million, seven hundred thirty thousand, nine hundred seventy-nine".