9987255 has 24 divisors (see below), whose sum is σ = 18223920. Its totient is φ = 5045760.

The previous prime is 9987253. The next prime is 9987283. The reversal of 9987255 is 5527899.

It is a happy number.

9987255 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 9987255 - 2¹ = 9987253 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

9987255 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9987255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9987253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4986 + ... + 6695.

It is an arithmetic number, because the mean of its divisors is an integer number (759330).

Almost surely, 2^9987255 is an apocalyptic number.

9987255 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9987255 is a deficient number, since it is larger than the sum of its proper divisors (8236665).

9987255 is a wasteful number, since it uses less digits than its factorization.

9987255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11711 (or 11708 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 9987255 is about 3160.2618562391. The cubic root of 9987255 is about 215.3519025246.

The spelling of 9987255 in words is "nine million, nine hundred eighty-seven thousand, two hundred fifty-five".