9261220 has 24 divisors (see below), whose sum is σ = 19817784. Its totient is φ = 3634176.

The previous prime is 9261199. The next prime is 9261229. The reversal of 9261220 is 221629.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1240996 + 8020224 = 1114^2 + 2832^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9261191 and 9261200.

It is not an unprimeable number, because it can be changed into a prime (9261229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3309 + ... + 5428.

It is an arithmetic number, because the mean of its divisors is an integer number (825741).

Almost surely, 2^9261220 is an apocalyptic number.

It is an amenable number.

9261220 is an abundant number, since it is smaller than the sum of its proper divisors (10556564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9261220 is a wasteful number, since it uses less digits than its factorization.

9261220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8799 (or 8797 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 9261220 is about 3043.2252627763. The cubic root of 9261220 is about 210.0016628742.

Adding to 9261220 its reverse (221629), we get a palindrome (9482849).

The spelling of 9261220 in words is "nine million, two hundred sixty-one thousand, two hundred twenty".