142322521 has 32 divisors (see below), whose sum is σ = 177448320. Its totient is φ = 112435200.

The previous prime is 142322513. The next prime is 142322527. The reversal of 142322521 is 125223241.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 142322521 - 2³ = 142322513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 142322492 and 142322501.

It is not an unprimeable number, because it can be changed into a prime (142322527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145185 + ... + 146161.

It is an arithmetic number, because the mean of its divisors is an integer number (5545260).

Almost surely, 2^142322521 is an apocalyptic number.

142322521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

142322521 is a deficient number, since it is larger than the sum of its proper divisors (35125799).

142322521 is a wasteful number, since it uses less digits than its factorization.

142322521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065.

The product of its digits is 960, while the sum is 22.

The square root of 142322521 is about 11929.9002929614. The cubic root of 142322521 is about 522.1050284596.

Adding to 142322521 its reverse (125223241), we get a palindrome (267545762).

The spelling of 142322521 in words is "one hundred forty-two million, three hundred twenty-two thousand, five hundred twenty-one".