142239941 has 2 divisors, whose sum is σ = 142239942. Its totient is φ = 142239940.

The previous prime is 142239919. The next prime is 142239961. The reversal of 142239941 is 149932241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93993025 + 48246916 = 9695^2 + 6946^2 .

It is an emirp because it is prime and its reverse (149932241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 142239941 - 2²² = 138045637 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (142239961) 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, 71119970 + 71119971.

It is an arithmetic number, because the mean of its divisors is an integer number (71119971).

Almost surely, 2^142239941 is an apocalyptic number.

It is an amenable number.

142239941 is a deficient number, since it is larger than the sum of its proper divisors (1).

142239941 is an equidigital number, since it uses as much as digits as its factorization.

142239941 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 142239941 is about 11926.4387392046. The cubic root of 142239941 is about 522.0040283400.

The spelling of 142239941 in words is "one hundred forty-two million, two hundred thirty-nine thousand, nine hundred forty-one".