142564823 has 4 divisors (see below), whose sum is σ = 145880328. Its totient is φ = 139249320.

The previous prime is 142564819. The next prime is 142564843. The reversal of 142564823 is 328465241.

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 142564823 - 2² = 142564819 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 (142564843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1657688 + ... + 1657773.

It is an arithmetic number, because the mean of its divisors is an integer number (36470082).

Almost surely, 2^142564823 is an apocalyptic number.

142564823 is a deficient number, since it is larger than the sum of its proper divisors (3315505).

142564823 is an equidigital number, since it uses as much as digits as its factorization.

142564823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3315504.

The product of its digits is 46080, while the sum is 35.

The square root of 142564823 is about 11940.0512142955. The cubic root of 142564823 is about 522.4011525196.

The spelling of 142564823 in words is "one hundred forty-two million, five hundred sixty-four thousand, eight hundred twenty-three".