142666543 has 4 divisors (see below), whose sum is σ = 145084680. Its totient is φ = 140248408.

The previous prime is 142666541. The next prime is 142666547. The reversal of 142666543 is 345666241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 345666241 = 23 ⋅15028967.

It is a cyclic number.

It is not a de Polignac number, because 142666543 - 2¹ = 142666541 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 (142666541) 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 3 ways as a sum of consecutive naturals, for example, 1208980 + ... + 1209097.

It is an arithmetic number, because the mean of its divisors is an integer number (36271170).

Almost surely, 2^142666543 is an apocalyptic number.

142666543 is a deficient number, since it is larger than the sum of its proper divisors (2418137).

142666543 is an equidigital number, since it uses as much as digits as its factorization.

142666543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2418136.

The product of its digits is 103680, while the sum is 37.

The square root of 142666543 is about 11944.3100679780. The cubic root of 142666543 is about 522.5253673879.

The spelling of 142666543 in words is "one hundred forty-two million, six hundred sixty-six thousand, five hundred forty-three".