87158142 has 24 divisors (see below), whose sum is σ = 191940840. Its totient is φ = 28576080.

The previous prime is 87158117. The next prime is 87158153. The reversal of 87158142 is 24185178.

87158142 is a `hidden beast` number, since 8 + 71 + 581 + 4 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 87158097 and 87158106.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38592 + ... + 40787.

It is an arithmetic number, because the mean of its divisors is an integer number (7997535).

Almost surely, 2^87158142 is an apocalyptic number.

87158142 is an abundant number, since it is smaller than the sum of its proper divisors (104782698).

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

87158142 is a wasteful number, since it uses less digits than its factorization.

87158142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79448 (or 79445 counting only the distinct ones).

The product of its digits is 17920, while the sum is 36.

The square root of 87158142 is about 9335.8525052616. The cubic root of 87158142 is about 443.3730803994.

The spelling of 87158142 in words is "eighty-seven million, one hundred fifty-eight thousand, one hundred forty-two".