142325521 has 4 divisors (see below), whose sum is σ = 153273652. Its totient is φ = 131377392.

The previous prime is 142325467. The next prime is 142325539. The reversal of 142325521 is 125523241.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 25361296 + 116964225 = 5036^2 + 10815^2 .

It is a cyclic number.

It is not a de Polignac number, because 142325521 - 2¹⁵ = 142292753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142325221) 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, 5474046 + ... + 5474071.

It is an arithmetic number, because the mean of its divisors is an integer number (38318413).

Almost surely, 2^142325521 is an apocalyptic number.

It is an amenable number.

142325521 is a deficient number, since it is larger than the sum of its proper divisors (10948131).

142325521 is a wasteful number, since it uses less digits than its factorization.

142325521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10948130.

The product of its digits is 2400, while the sum is 25.

The square root of 142325521 is about 11930.0260267947. The cubic root of 142325521 is about 522.1086968977.

Adding to 142325521 its reverse (125523241), we get a palindrome (267848762).

The spelling of 142325521 in words is "one hundred forty-two million, three hundred twenty-five thousand, five hundred twenty-one".