9420987 has 16 divisors (see below), whose sum is σ = 12861440. Its totient is φ = 6132672.

The previous prime is 9420959. The next prime is 9420997. The reversal of 9420987 is 7890249.

It is not a de Polignac number, because 9420987 - 2¹⁵ = 9388219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9420947) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 29943 + ... + 30255.

It is an arithmetic number, because the mean of its divisors is an integer number (803840).

Almost surely, 2^9420987 is an apocalyptic number.

9420987 is a deficient number, since it is larger than the sum of its proper divisors (3440453).

9420987 is a wasteful number, since it uses less digits than its factorization.

9420987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 9420987 is about 3069.3626374217. The cubic root of 9420987 is about 211.2023769031.

The spelling of 9420987 in words is "nine million, four hundred twenty thousand, nine hundred eighty-seven".