9981425 has 12 divisors (see below), whose sum is σ = 12915840. Its totient is φ = 7637520.

The previous prime is 9981383. The next prime is 9981463. The reversal of 9981425 is 5241899.

9981425 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 9981425 - 2¹² = 9977329 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8105 + ... + 9254.

It is an arithmetic number, because the mean of its divisors is an integer number (1076320).

Almost surely, 2^9981425 is an apocalyptic number.

It is an amenable number.

9981425 is a deficient number, since it is larger than the sum of its proper divisors (2934415).

9981425 is a wasteful number, since it uses less digits than its factorization.

9981425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17392 (or 17387 counting only the distinct ones).

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

The square root of 9981425 is about 3159.3393296700. The cubic root of 9981425 is about 215.3099909093.

The spelling of 9981425 in words is "nine million, nine hundred eighty-one thousand, four hundred twenty-five".