9999261 has 16 divisors (see below), whose sum is σ = 15067200. Its totient is φ = 6552144.

The previous prime is 9999233. The next prime is 9999271. The reversal of 9999261 is 1629999.

It is a happy number.

9999261 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 9999261 - 2⁹ = 9998749 is a prime.

It is a super-2 number, since 2×9999261² = 199970441092242, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9999221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1546 + ... + 4731.

It is an arithmetic number, because the mean of its divisors is an integer number (941700).

Almost surely, 2^9999261 is an apocalyptic number.

It is an amenable number.

9999261 is a deficient number, since it is larger than the sum of its proper divisors (5067939).

9999261 is a wasteful number, since it uses less digits than its factorization.

9999261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6345 (or 6339 counting only the distinct ones).

The product of its digits is 78732, while the sum is 45.

The square root of 9999261 is about 3162.1608118500. The cubic root of 9999261 is about 215.4381617817.

The spelling of 9999261 in words is "nine million, nine hundred ninety-nine thousand, two hundred sixty-one".