142656643 has 4 divisors (see below), whose sum is σ = 142755880. Its totient is φ = 142557408.

The previous prime is 142656641. The next prime is 142656653. The reversal of 142656643 is 346656241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346656241 = 4027 ⋅86083.

It is a cyclic number.

It is not a de Polignac number, because 142656643 - 2¹ = 142656641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142656641) 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, 47430 + ... + 50347.

It is an arithmetic number, because the mean of its divisors is an integer number (35688970).

Almost surely, 2^142656643 is an apocalyptic number.

142656643 is a deficient number, since it is larger than the sum of its proper divisors (99237).

142656643 is an equidigital number, since it uses as much as digits as its factorization.

142656643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99236.

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

The square root of 142656643 is about 11943.8956375213. The cubic root of 142656643 is about 522.5132806465.

The spelling of 142656643 in words is "one hundred forty-two million, six hundred fifty-six thousand, six hundred forty-three".