9918261 has 32 divisors (see below), whose sum is σ = 15552000. Its totient is φ = 6237504.

The previous prime is 9918253. The next prime is 9918289. The reversal of 9918261 is 1628199.

It is not a de Polignac number, because 9918261 - 2³ = 9918253 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

Its product of digits (7776) is a multiple of the sum of its prime divisors (324).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9968261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41380 + ... + 41618.

It is an arithmetic number, because the mean of its divisors is an integer number (486000).

Almost surely, 2^9918261 is an apocalyptic number.

It is an amenable number.

9918261 is a deficient number, since it is larger than the sum of its proper divisors (5633739).

9918261 is a wasteful number, since it uses less digits than its factorization.

9918261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330 (or 324 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 9918261 is about 3149.3270709788. The cubic root of 9918261 is about 214.8548578715.

The spelling of 9918261 in words is "nine million, nine hundred eighteen thousand, two hundred sixty-one".