987142 has 8 divisors (see below), whose sum is σ = 1594656. Its totient is φ = 455592.

The previous prime is 987127. The next prime is 987143. The reversal of 987142 is 241789.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987143) by changing a digit.

987142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18958 + ... + 19009.

It is an arithmetic number, because the mean of its divisors is an integer number (199332).

2⁹⁸⁷¹⁴² is an apocalyptic number.

987142 is a deficient number, since it is larger than the sum of its proper divisors (607514).

987142 is a wasteful number, since it uses less digits than its factorization.

987142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37982.

The product of its digits is 4032, while the sum is 31.

The square root of 987142 is about 993.5502000402. The cubic root of 987142 is about 99.5695497847.

The spelling of 987142 in words is "nine hundred eighty-seven thousand, one hundred forty-two".