142321145 has 8 divisors (see below), whose sum is σ = 170984520. Its totient is φ = 113724160.

The previous prime is 142321141. The next prime is 142321147. The reversal of 142321145 is 541123241.

It can be written as a sum of positive squares in 4 ways, for example, as 21409129 + 120912016 = 4627^2 + 10996^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 142321145 - 2² = 142321141 is a prime.

It is a super-2 number, since 2×142321145² = 40510616628222050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 142321145.

It is not an unprimeable number, because it can be changed into a prime (142321141) 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 7 ways as a sum of consecutive naturals, for example, 11750 + ... + 20559.

It is an arithmetic number, because the mean of its divisors is an integer number (21373065).

Almost surely, 2^142321145 is an apocalyptic number.

It is an amenable number.

142321145 is a deficient number, since it is larger than the sum of its proper divisors (28663375).

142321145 is an equidigital number, since it uses as much as digits as its factorization.

142321145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33195.

The product of its digits is 960, while the sum is 23.

The square root of 142321145 is about 11929.8426225998. The cubic root of 142321145 is about 522.1033458520.

Adding to 142321145 its reverse (541123241), we get a palindrome (683444386).

The spelling of 142321145 in words is "one hundred forty-two million, three hundred twenty-one thousand, one hundred forty-five".