142326643 has 4 divisors (see below), whose sum is σ = 142829848. Its totient is φ = 141823440.

The previous prime is 142326631. The next prime is 142326649. The reversal of 142326643 is 346623241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346623241 = 1213 ⋅285757.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-142326643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142326649) 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, 251178 + ... + 251743.

It is an arithmetic number, because the mean of its divisors is an integer number (35707462).

Almost surely, 2^142326643 is an apocalyptic number.

142326643 is a deficient number, since it is larger than the sum of its proper divisors (503205).

142326643 is an equidigital number, since it uses as much as digits as its factorization.

142326643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 503204.

The product of its digits is 20736, while the sum is 31.

The square root of 142326643 is about 11930.0730509079. The cubic root of 142326643 is about 522.1100688803.

Adding to 142326643 its reverse (346623241), we get a palindrome (488949884).

The spelling of 142326643 in words is "one hundred forty-two million, three hundred twenty-six thousand, six hundred forty-three".