142944647 has 4 divisors (see below), whose sum is σ = 142989000. Its totient is φ = 142900296.

The previous prime is 142944629. The next prime is 142944649. The reversal of 142944647 is 746449241.

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 142944647 - 2⁶ = 142944583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142944649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16928 + ... + 23925.

It is an arithmetic number, because the mean of its divisors is an integer number (35747250).

Almost surely, 2^142944647 is an apocalyptic number.

142944647 is a deficient number, since it is larger than the sum of its proper divisors (44353).

142944647 is an equidigital number, since it uses as much as digits as its factorization.

142944647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44352.

The product of its digits is 193536, while the sum is 41.

The square root of 142944647 is about 11955.9460938899. The cubic root of 142944647 is about 522.8646715926.

The spelling of 142944647 in words is "one hundred forty-two million, nine hundred forty-four thousand, six hundred forty-seven".