142332521 has 4 divisors (see below), whose sum is σ = 142531200. Its totient is φ = 142133844.

The previous prime is 142332503. The next prime is 142332523. The reversal of 142332521 is 125233241.

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 142332521 - 2⁶ = 142332457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142332523) 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, 98261 + ... + 99698.

It is an arithmetic number, because the mean of its divisors is an integer number (35632800).

Almost surely, 2^142332521 is an apocalyptic number.

It is an amenable number.

142332521 is a deficient number, since it is larger than the sum of its proper divisors (198679).

142332521 is an equidigital number, since it uses as much as digits as its factorization.

142332521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198678.

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

The square root of 142332521 is about 11930.3194005861. The cubic root of 142332521 is about 522.1172563861.

Adding to 142332521 its reverse (125233241), we get a palindrome (267565762).

The spelling of 142332521 in words is "one hundred forty-two million, three hundred thirty-two thousand, five hundred twenty-one".