142421023 has 4 divisors (see below), whose sum is σ = 142449160. Its totient is φ = 142392888.

The previous prime is 142421021. The next prime is 142421051. The reversal of 142421023 is 320124241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320124241 = 1571 ⋅203771.

It is a cyclic number.

It is not a de Polignac number, because 142421023 - 2¹ = 142421021 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 (142421021) 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, 4140 + ... + 17377.

It is an arithmetic number, because the mean of its divisors is an integer number (35612290).

Almost surely, 2^142421023 is an apocalyptic number.

142421023 is a deficient number, since it is larger than the sum of its proper divisors (28137).

142421023 is an equidigital number, since it uses as much as digits as its factorization.

142421023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28136.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 142421023 is about 11934.0279453335. The cubic root of 142421023 is about 522.2254510254.

Adding to 142421023 its reverse (320124241), we get a palindrome (462545264).

The spelling of 142421023 in words is "one hundred forty-two million, four hundred twenty-one thousand, twenty-three".