9987405 has 16 divisors (see below), whose sum is σ = 16675200. Its totient is φ = 5094848.

The previous prime is 9987403. The next prime is 9987413. The reversal of 9987405 is 5047899.

It is a cyclic number.

It is not a de Polignac number, because 9987405 - 2¹ = 9987403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9987403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14130 + ... + 14819.

It is an arithmetic number, because the mean of its divisors is an integer number (1042200).

Almost surely, 2^9987405 is an apocalyptic number.

It is an amenable number.

9987405 is a deficient number, since it is larger than the sum of its proper divisors (6687795).

9987405 is a wasteful number, since it uses less digits than its factorization.

9987405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28980.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 9987405 is about 3160.2855883606. The cubic root of 9987405 is about 215.3529806528.

The spelling of 9987405 in words is "nine million, nine hundred eighty-seven thousand, four hundred five".