142311021 has 8 divisors (see below), whose sum is σ = 189960864. Its totient is φ = 94767600.

The previous prime is 142310983. The next prime is 142311023. The reversal of 142311021 is 120113241.

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

It is not a de Polignac number, because 142311021 - 2¹⁰ = 142309997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142311023) 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, 23430 + ... + 28871.

It is an arithmetic number, because the mean of its divisors is an integer number (23745108).

Almost surely, 2^142311021 is an apocalyptic number.

It is an amenable number.

142311021 is a deficient number, since it is larger than the sum of its proper divisors (47649843).

142311021 is an equidigital number, since it uses as much as digits as its factorization.

142311021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53211.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 142311021 is about 11929.4183009902. The cubic root of 142311021 is about 522.0909656359.

Adding to 142311021 its reverse (120113241), we get a palindrome (262424262).

The spelling of 142311021 in words is "one hundred forty-two million, three hundred eleven thousand, twenty-one".