142320404 has 6 divisors (see below), whose sum is σ = 249060714. Its totient is φ = 71160200.

The previous prime is 142320397. The next prime is 142320407. The reversal of 142320404 is 404023241.

It can be written as a sum of positive squares in only one way, i.e., 129732100 + 12588304 = 11390^2 + 3548^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (142320407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17790047 + ... + 17790054.

It is an arithmetic number, because the mean of its divisors is an integer number (41510119).

Almost surely, 2^142320404 is an apocalyptic number.

It is an amenable number.

142320404 is a deficient number, since it is larger than the sum of its proper divisors (106740310).

142320404 is a wasteful number, since it uses less digits than its factorization.

142320404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35580105 (or 35580103 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 142320404 is about 11929.8115659888. The cubic root of 142320404 is about 522.1024397341.

Adding to 142320404 its reverse (404023241), we get a palindrome (546343645).

The spelling of 142320404 in words is "one hundred forty-two million, three hundred twenty thousand, four hundred four".