142239473 has 2 divisors, whose sum is σ = 142239474. Its totient is φ = 142239472.

The previous prime is 142239467. The next prime is 142239497. The reversal of 142239473 is 374932241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136702864 + 5536609 = 11692^2 + 2353^2 .

It is a cyclic number.

It is not a de Polignac number, because 142239473 - 2⁸ = 142239217 is a prime.

It is a super-3 number, since 3×142239473³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (142239413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 71119736 + 71119737.

It is an arithmetic number, because the mean of its divisors is an integer number (71119737).

Almost surely, 2^142239473 is an apocalyptic number.

It is an amenable number.

142239473 is a deficient number, since it is larger than the sum of its proper divisors (1).

142239473 is an equidigital number, since it uses as much as digits as its factorization.

142239473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 35.

The square root of 142239473 is about 11926.4191189141. The cubic root of 142239473 is about 522.0034558375.

The spelling of 142239473 in words is "one hundred forty-two million, two hundred thirty-nine thousand, four hundred seventy-three".