987615 has 24 divisors (see below), whose sum is σ = 1813968. Its totient is φ = 495360.

The previous prime is 987607. The next prime is 987631. The reversal of 987615 is 516789.

It is not a de Polignac number, because 987615 - 2³ = 987607 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 987615.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 987615.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 120 + ... + 1410.

It is an arithmetic number, because the mean of its divisors is an integer number (75582).

2⁹⁸⁷⁶¹⁵ is an apocalyptic number.

987615 is a deficient number, since it is larger than the sum of its proper divisors (826353).

987615 is a wasteful number, since it uses less digits than its factorization.

987615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1316 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 987615 is about 993.7882068127. The cubic root of 987615 is about 99.5854505287.

The spelling of 987615 in words is "nine hundred eighty-seven thousand, six hundred fifteen".