142136506 has 4 divisors (see below), whose sum is σ = 213204762. Its totient is φ = 71068252.

The previous prime is 142136483. The next prime is 142136521. The reversal of 142136506 is 605631241.

142136506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 605631241 = 61 ⋅9928381.

It can be written as a sum of positive squares in only one way, i.e., 140635881 + 1500625 = 11859^2 + 1225^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35534125 + ... + 35534128.

Almost surely, 2^142136506 is an apocalyptic number.

142136506 is a deficient number, since it is larger than the sum of its proper divisors (71068256).

142136506 is an equidigital number, since it uses as much as digits as its factorization.

142136506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71068255.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 142136506 is about 11922.1015764839. The cubic root of 142136506 is about 521.8774661865.

Adding to 142136506 its reverse (605631241), we get a palindrome (747767747).

The spelling of 142136506 in words is "one hundred forty-two million, one hundred thirty-six thousand, five hundred six".