9861256 has 8 divisors (see below), whose sum is σ = 18489870. Its totient is φ = 4930624.

The previous prime is 9861253. The next prime is 9861301. The reversal of 9861256 is 6521689.

It can be written as a sum of positive squares in only one way, i.e., 9205156 + 656100 = 3034^2 + 810^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (9861253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616321 + ... + 616336.

Almost surely, 2^9861256 is an apocalyptic number.

It is an amenable number.

9861256 is a deficient number, since it is larger than the sum of its proper divisors (8628614).

9861256 is a wasteful number, since it uses less digits than its factorization.

9861256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232663 (or 1232659 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 9861256 is about 3140.2636831960. The cubic root of 9861256 is about 214.4424421249.

The spelling of 9861256 in words is "nine million, eight hundred sixty-one thousand, two hundred fifty-six".