987145 has 8 divisors (see below), whose sum is σ = 1247040. Its totient is φ = 748080.

The previous prime is 987143. The next prime is 987191. The reversal of 987145 is 541789.

It is a happy number.

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

It is not a de Polignac number, because 987145 - 2¹ = 987143 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 987145.

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

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 7 ways as a sum of consecutive naturals, for example, 5101 + ... + 5290.

It is an arithmetic number, because the mean of its divisors is an integer number (155880).

2⁹⁸⁷¹⁴⁵ is an apocalyptic number.

987145 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

987145 is a deficient number, since it is larger than the sum of its proper divisors (259895).

987145 is a wasteful number, since it uses less digits than its factorization.

987145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10415.

The product of its digits is 10080, while the sum is 34.

The square root of 987145 is about 993.5517097766. The cubic root of 987145 is about 99.5696506511.

The spelling of 987145 in words is "nine hundred eighty-seven thousand, one hundred forty-five".