987555 has 8 divisors (see below), whose sum is σ = 1580112. Its totient is φ = 526688.

The previous prime is 987541. The next prime is 987559. The reversal of 987555 is 555789.

987555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 987555 - 2⁵ = 987523 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (987559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32904 + ... + 32933.

It is an arithmetic number, because the mean of its divisors is an integer number (197514).

2⁹⁸⁷⁵⁵⁵ is an apocalyptic number.

987555 is a deficient number, since it is larger than the sum of its proper divisors (592557).

987555 is a wasteful number, since it uses less digits than its factorization.

987555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65845.

The product of its digits is 63000, while the sum is 39.

The square root of 987555 is about 993.7580188356. The cubic root of 987555 is about 99.5834338022.

The spelling of 987555 in words is "nine hundred eighty-seven thousand, five hundred fifty-five".