142320641 has 4 divisors (see below), whose sum is σ = 142345284. Its totient is φ = 142296000.

The previous prime is 142320613. The next prime is 142320643. The reversal of 142320641 is 146023241.

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 141110641 + 1210000 = 11879^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 142320641 - 2²⁶ = 75211777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (142320643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1541 + ... + 16941.

It is an arithmetic number, because the mean of its divisors is an integer number (35586321).

Almost surely, 2^142320641 is an apocalyptic number.

It is an amenable number.

142320641 is a deficient number, since it is larger than the sum of its proper divisors (24643).

142320641 is an equidigital number, since it uses as much as digits as its factorization.

142320641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24642.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 142320641 is about 11929.8214990837. The cubic root of 142320641 is about 522.1027295454.

Adding to 142320641 its reverse (146023241), we get a palindrome (288343882).

The spelling of 142320641 in words is "one hundred forty-two million, three hundred twenty thousand, six hundred forty-one".