87186142 has 4 divisors (see below), whose sum is σ = 130779216. Its totient is φ = 43593070.

The previous prime is 87186137. The next prime is 87186161. The reversal of 87186142 is 24168178.

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 polite number, since it can be written as a sum of consecutive naturals, namely, 21796534 + ... + 21796537.

It is an arithmetic number, because the mean of its divisors is an integer number (32694804).

Almost surely, 2^87186142 is an apocalyptic number.

87186142 is a deficient number, since it is larger than the sum of its proper divisors (43593074).

87186142 is a wasteful number, since it uses less digits than its factorization.

87186142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43593073.

The product of its digits is 21504, while the sum is 37.

The square root of 87186142 is about 9337.3519800851. The cubic root of 87186142 is about 443.4205539412.

The spelling of 87186142 in words is "eighty-seven million, one hundred eighty-six thousand, one hundred forty-two".