135220142 has 8 divisors (see below), whose sum is σ = 214761456. Its totient is φ = 63632992.

The previous prime is 135220133. The next prime is 135220147. The reversal of 135220142 is 241022531.

135220142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135220147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1988498 + ... + 1988565.

It is an arithmetic number, because the mean of its divisors is an integer number (26845182).

Almost surely, 2^135220142 is an apocalyptic number.

135220142 is a deficient number, since it is larger than the sum of its proper divisors (79541314).

135220142 is a wasteful number, since it uses less digits than its factorization.

135220142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977082.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 135220142 is about 11628.4195830732. The cubic root of 135220142 is about 513.2714751833.

Adding to 135220142 its reverse (241022531), we get a palindrome (376242673).

The spelling of 135220142 in words is "one hundred thirty-five million, two hundred twenty thousand, one hundred forty-two".