142645643 has 4 divisors (see below), whose sum is σ = 163023600. Its totient is φ = 122267688.

The previous prime is 142645579. The next prime is 142645667. The reversal of 142645643 is 346546241.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 142645643 - 2⁶ = 142645579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142605643) 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, 10188968 + ... + 10188981.

It is an arithmetic number, because the mean of its divisors is an integer number (40755900).

Almost surely, 2^142645643 is an apocalyptic number.

142645643 is a deficient number, since it is larger than the sum of its proper divisors (20377957).

142645643 is an equidigital number, since it uses as much as digits as its factorization.

142645643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20377956.

The product of its digits is 69120, while the sum is 35.

The square root of 142645643 is about 11943.4351423701. The cubic root of 142645643 is about 522.4998502781.

The spelling of 142645643 in words is "one hundred forty-two million, six hundred forty-five thousand, six hundred forty-three".