142921443 has 16 divisors (see below), whose sum is σ = 221895936. Its totient is φ = 80127840.

The previous prime is 142921399. The next prime is 142921447. The reversal of 142921443 is 344129241.

It is not a de Polignac number, because 142921443 - 2¹⁸ = 142659299 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 142921443.

It is not an unprimeable number, because it can be changed into a prime (142921447) 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 15 ways as a sum of consecutive naturals, for example, 63093 + ... + 65318.

It is an arithmetic number, because the mean of its divisors is an integer number (13868496).

Almost surely, 2^142921443 is an apocalyptic number.

142921443 is a deficient number, since it is larger than the sum of its proper divisors (78974493).

142921443 is a wasteful number, since it uses less digits than its factorization.

142921443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128474.

The product of its digits is 6912, while the sum is 30.

The square root of 142921443 is about 11954.9756586954. The cubic root of 142921443 is about 522.8363781036.

The spelling of 142921443 in words is "one hundred forty-two million, nine hundred twenty-one thousand, four hundred forty-three".