9918425 has 12 divisors (see below), whose sum is σ = 13417296. Its totient is φ = 7213200.

The previous prime is 9918421. The next prime is 9918521. The reversal of 9918425 is 5248199.

It is not a de Polignac number, because 9918425 - 2² = 9918421 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9918421) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17759 + ... + 18308.

It is an arithmetic number, because the mean of its divisors is an integer number (1118108).

Almost surely, 2^9918425 is an apocalyptic number.

It is an amenable number.

9918425 is a deficient number, since it is larger than the sum of its proper divisors (3498871).

9918425 is a wasteful number, since it uses less digits than its factorization.

9918425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36088 (or 36083 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 9918425 is about 3149.3531081795. The cubic root of 9918425 is about 214.8560420846.

The spelling of 9918425 in words is "nine million, nine hundred eighteen thousand, four hundred twenty-five".