87128142 has 16 divisors (see below), whose sum is σ = 174547920. Its totient is φ = 28994112.

The previous prime is 87128141. The next prime is 87128143. The reversal of 87128142 is 24182178.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87128141) and next prime (87128143).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87128141) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 8167 + ... + 15522.

It is an arithmetic number, because the mean of its divisors is an integer number (10909245).

Almost surely, 2^87128142 is an apocalyptic number.

87128142 is an abundant number, since it is smaller than the sum of its proper divisors (87419778).

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

87128142 is a wasteful number, since it uses less digits than its factorization.

87128142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24307.

The product of its digits is 7168, while the sum is 33.

The square root of 87128142 is about 9334.2456577915. The cubic root of 87128142 is about 443.3222046063.

The spelling of 87128142 in words is "eighty-seven million, one hundred twenty-eight thousand, one hundred forty-two".