142320445 has 8 divisors (see below), whose sum is σ = 170861400. Its totient is φ = 113805120.

The previous prime is 142320443. The next prime is 142320457. The reversal of 142320445 is 544023241.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 12292036 + 130028409 = 3506^2 + 11403^2 .

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

It is not a de Polignac number, because 142320445 - 2¹ = 142320443 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142320443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9331 + ... + 19279.

It is an arithmetic number, because the mean of its divisors is an integer number (21357675).

Almost surely, 2^142320445 is an apocalyptic number.

It is an amenable number.

142320445 is a deficient number, since it is larger than the sum of its proper divisors (28540955).

142320445 is an equidigital number, since it uses as much as digits as its factorization.

142320445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12815.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 142320445 is about 11929.8132843729. The cubic root of 142320445 is about 522.1024898702.

Adding to 142320445 its reverse (544023241), we get a palindrome (686343686).

It can be divided in two parts, 1423204 and 45, that added together give a square (1423249 = 1193²).

The spelling of 142320445 in words is "one hundred forty-two million, three hundred twenty thousand, four hundred forty-five".