9985281 has 4 divisors (see below), whose sum is σ = 13313712. Its totient is φ = 6656852.

The previous prime is 9985267. The next prime is 9985303. The reversal of 9985281 is 1825899.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1825899 = 3 ⋅608633.

It is a cyclic number.

It is not a de Polignac number, because 9985281 - 2⁵ = 9985249 is a prime.

It is a super-2 number, since 2×9985281² = 199411673297922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9985231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1664211 + ... + 1664216.

It is an arithmetic number, because the mean of its divisors is an integer number (3328428).

Almost surely, 2^9985281 is an apocalyptic number.

It is an amenable number.

9985281 is a deficient number, since it is larger than the sum of its proper divisors (3328431).

9985281 is a wasteful number, since it uses less digits than its factorization.

9985281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3328430.

The product of its digits is 51840, while the sum is 42.

The square root of 9985281 is about 3159.9495249133. The cubic root of 9985281 is about 215.3377133516.

The spelling of 9985281 in words is "nine million, nine hundred eighty-five thousand, two hundred eighty-one".