87135142 has 4 divisors (see below), whose sum is σ = 130702716. Its totient is φ = 43567570.

The previous prime is 87135137. The next prime is 87135161. The reversal of 87135142 is 24153178.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21783784 + ... + 21783787.

It is an arithmetic number, because the mean of its divisors is an integer number (32675679).

Almost surely, 2^87135142 is an apocalyptic number.

87135142 is a deficient number, since it is larger than the sum of its proper divisors (43567574).

87135142 is a wasteful number, since it uses less digits than its factorization.

87135142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43567573.

The product of its digits is 6720, while the sum is 31.

The square root of 87135142 is about 9334.6206136082. The cubic root of 87135142 is about 443.3340766691.

The spelling of 87135142 in words is "eighty-seven million, one hundred thirty-five thousand, one hundred forty-two".