142310021 has 8 divisors (see below), whose sum is σ = 164468160. Its totient is φ = 120608928.

The previous prime is 142310017. The next prime is 142310023. The reversal of 142310021 is 120013241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 142310021 - 2² = 142310017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142309978 and 142310005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142310023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113591 + ... + 114836.

It is an arithmetic number, because the mean of its divisors is an integer number (20558520).

Almost surely, 2^142310021 is an apocalyptic number.

It is an amenable number.

142310021 is a deficient number, since it is larger than the sum of its proper divisors (22158139).

142310021 is an equidigital number, since it uses as much as digits as its factorization.

142310021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228523.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 142310021 is about 11929.3763877245. The cubic root of 142310021 is about 522.0897427459.

Adding to 142310021 its reverse (120013241), we get a palindrome (262323262).

The spelling of 142310021 in words is "one hundred forty-two million, three hundred ten thousand, twenty-one".