87001142 has 4 divisors (see below), whose sum is σ = 130501716. Its totient is φ = 43500570.

The previous prime is 87001141. The next prime is 87001147. The reversal of 87001142 is 24110078.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87001141) 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 as a sum of consecutive naturals, namely, 21750284 + ... + 21750287.

It is an arithmetic number, because the mean of its divisors is an integer number (32625429).

Almost surely, 2^87001142 is an apocalyptic number.

87001142 is a deficient number, since it is larger than the sum of its proper divisors (43500574).

87001142 is a wasteful number, since it uses less digits than its factorization.

87001142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43500573.

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 87001142 is about 9327.4402705137. The cubic root of 87001142 is about 443.1067009564.

The spelling of 87001142 in words is "eighty-seven million, one thousand, one hundred forty-two".