142521 has 4 divisors (see below), whose sum is σ = 190032. Its totient is φ = 95012.

The previous prime is 142501. The next prime is 142529. The reversal of 142521 is 125241.

142521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 142521 - 2¹⁰ = 141497 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 142521.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 142521.

It is not an unprimeable number, because it can be changed into a prime (142529) 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, 23751 + ... + 23756.

It is an arithmetic number, because the mean of its divisors is an integer number (47508).

2¹⁴²⁵²¹ is an apocalyptic number.

It is an amenable number.

142521 is a deficient number, since it is larger than the sum of its proper divisors (47511).

142521 is an equidigital number, since it uses as much as digits as its factorization.

142521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47510.

The product of its digits is 80, while the sum is 15.

The square root of 142521 is about 377.5195359183. The cubic root of 142521 is about 52.2347620072.

Adding to 142521 its reverse (125241), we get a palindrome (267762).

The spelling of 142521 in words is "one hundred forty-two thousand, five hundred twenty-one".