142146643 has 4 divisors (see below), whose sum is σ = 142355448. Its totient is φ = 141937840.

The previous prime is 142146577. The next prime is 142146649. The reversal of 142146643 is 346641241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346641241 = 71 ⋅4882271.

It is a cyclic number.

It is not a de Polignac number, because 142146643 - 2¹⁷ = 142015571 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142146649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103378 + ... + 104743.

It is an arithmetic number, because the mean of its divisors is an integer number (35588862).

Almost surely, 2^142146643 is an apocalyptic number.

142146643 is a deficient number, since it is larger than the sum of its proper divisors (208805).

142146643 is an equidigital number, since it uses as much as digits as its factorization.

142146643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208804.

The product of its digits is 13824, while the sum is 31.

The square root of 142146643 is about 11922.5267036816. The cubic root of 142146643 is about 521.8898724436.

Adding to 142146643 its reverse (346641241), we get a palindrome (488787884).

The spelling of 142146643 in words is "one hundred forty-two million, one hundred forty-six thousand, six hundred forty-three".