142643441 has 8 divisors (see below), whose sum is σ = 143972640. Its totient is φ = 141318688.

The previous prime is 142643381. The next prime is 142643461. The reversal of 142643441 is 144346241.

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

It is a cyclic number.

It is not a de Polignac number, because 142643441 - 2⁶ = 142643377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142643461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112670 + ... + 113928.

It is an arithmetic number, because the mean of its divisors is an integer number (17996580).

Almost surely, 2^142643441 is an apocalyptic number.

It is an amenable number.

142643441 is a deficient number, since it is larger than the sum of its proper divisors (1329199).

142643441 is a wasteful number, since it uses less digits than its factorization.

142643441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223.

The product of its digits is 9216, while the sum is 29.

The square root of 142643441 is about 11943.3429574805. The cubic root of 142643441 is about 522.4971616796.

Adding to 142643441 its reverse (144346241), we get a palindrome (286989682).

The spelling of 142643441 in words is "one hundred forty-two million, six hundred forty-three thousand, four hundred forty-one".