142532321 has 4 divisors (see below), whose sum is σ = 142556352. Its totient is φ = 142508292.

The previous prime is 142532297. The next prime is 142532363. The reversal of 142532321 is 123235241.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 123235241 = 2273 ⋅54217.

It is a cyclic number.

It is not a de Polignac number, because 142532321 - 2¹⁴ = 142515937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (142532371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3980 + ... + 17346.

It is an arithmetic number, because the mean of its divisors is an integer number (35639088).

Almost surely, 2^142532321 is an apocalyptic number.

It is an amenable number.

142532321 is a deficient number, since it is larger than the sum of its proper divisors (24031).

142532321 is a wasteful number, since it uses less digits than its factorization.

142532321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24030.

The product of its digits is 1440, while the sum is 23.

The square root of 142532321 is about 11938.6900872751. The cubic root of 142532321 is about 522.3614504100.

Adding to 142532321 its reverse (123235241), we get a palindrome (265767562).

The spelling of 142532321 in words is "one hundred forty-two million, five hundred thirty-two thousand, three hundred twenty-one".