142440322 has 4 divisors (see below), whose sum is σ = 213660486. Its totient is φ = 71220160.

The previous prime is 142440293. The next prime is 142440323. The reversal of 142440322 is 223044241.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 80802121 + 61638201 = 8989^2 + 7851^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 142440293 and 142440302.

It is not an unprimeable number, because it can be changed into a prime (142440323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35610079 + ... + 35610082.

Almost surely, 2^142440322 is an apocalyptic number.

142440322 is a deficient number, since it is larger than the sum of its proper divisors (71220164).

142440322 is an equidigital number, since it uses as much as digits as its factorization.

142440322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71220163.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 142440322 is about 11934.8364881971. The cubic root of 142440322 is about 522.2490383058.

Adding to 142440322 its reverse (223044241), we get a palindrome (365484563).

The spelling of 142440322 in words is "one hundred forty-two million, four hundred forty thousand, three hundred twenty-two".