142343021 has 16 divisors (see below), whose sum is σ = 152990208. Its totient is φ = 132105600.

The previous prime is 142343017. The next prime is 142343027. The reversal of 142343021 is 120343241.

It is a cyclic number.

It is not a de Polignac number, because 142343021 - 2² = 142343017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 142342984 and 142343002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142343027) 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 15 ways as a sum of consecutive naturals, for example, 255275 + ... + 255831.

It is an arithmetic number, because the mean of its divisors is an integer number (9561888).

Almost surely, 2^142343021 is an apocalyptic number.

It is an amenable number.

142343021 is a deficient number, since it is larger than the sum of its proper divisors (10647187).

142343021 is a wasteful number, since it uses less digits than its factorization.

142343021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 142343021 is about 11930.7594477468. The cubic root of 142343021 is about 522.1300950926.

Adding to 142343021 its reverse (120343241), we get a palindrome (262686262).

It can be divided in two parts, 1423 and 43021, that added together give a palindrome (44444).

The spelling of 142343021 in words is "one hundred forty-two million, three hundred forty-three thousand, twenty-one".