142135236 has 60 divisors (see below), whose sum is σ = 373659132. Its totient is φ = 47112192.

The previous prime is 142135229. The next prime is 142135247. The reversal of 142135236 is 632531241.

142135236 is a `hidden beast` number, since 1 + 421 + 3 + 5 + 236 = 666.

142135236 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 83612736 + 58522500 = 9144^2 + 7650^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 61396 + ... + 63668.

Almost surely, 2^142135236 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 142135236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186829566).

142135236 is an abundant number, since it is smaller than the sum of its proper divisors (231523896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

142135236 is a wasteful number, since it uses less digits than its factorization.

With its successor (142135237) it forms an eRAP, since the sums of their prime factors are consecutive (2482 and 2483).

142135236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2482 (or 2471 counting only the distinct ones).

The product of its digits is 4320, while the sum is 27.

The square root of 142135236 is about 11922.0483139434. The cubic root of 142135236 is about 521.8759118442.

Adding to 142135236 its reverse (632531241), we get a palindrome (774666477).

The spelling of 142135236 in words is "one hundred forty-two million, one hundred thirty-five thousand, two hundred thirty-six".