135111142 has 4 divisors (see below), whose sum is σ = 202666716. Its totient is φ = 67555570.

The previous prime is 135111139. The next prime is 135111187. The reversal of 135111142 is 241111531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 241111531 = 439 ⋅549229.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33777784 + ... + 33777787.

It is an arithmetic number, because the mean of its divisors is an integer number (50666679).

Almost surely, 2^135111142 is an apocalyptic number.

135111142 is a deficient number, since it is larger than the sum of its proper divisors (67555574).

135111142 is an equidigital number, since it uses as much as digits as its factorization.

135111142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67555573.

The product of its digits is 120, while the sum is 19.

The square root of 135111142 is about 11623.7318448078. The cubic root of 135111142 is about 513.1335232742.

Adding to 135111142 its reverse (241111531), we get a palindrome (376222673).

The spelling of 135111142 in words is "one hundred thirty-five million, one hundred eleven thousand, one hundred forty-two".