9870825 has 12 divisors (see below), whose sum is σ = 16319888. Its totient is φ = 5264400.

The previous prime is 9870811. The next prime is 9870827. The reversal of 9870825 is 5280789.

It is not a de Polignac number, because 9870825 - 2⁸ = 9870569 is a prime.

It is a Duffinian number.

9870825 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9870827) 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, 65731 + ... + 65880.

Almost surely, 2^9870825 is an apocalyptic number.

It is an amenable number.

9870825 is a deficient number, since it is larger than the sum of its proper divisors (6449063).

9870825 is a wasteful number, since it uses less digits than its factorization.

9870825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131624 (or 131619 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 9870825 is about 3141.7869119340. The cubic root of 9870825 is about 214.5117820534.

The spelling of 9870825 in words is "nine million, eight hundred seventy thousand, eight hundred twenty-five".