9142220 has 24 divisors (see below), whose sum is σ = 19270608. Its totient is φ = 3643200.

The previous prime is 9142207. The next prime is 9142229. The reversal of 9142220 is 222419.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 9142192 and 9142201.

It is not an unprimeable number, because it can be changed into a prime (9142229) 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, 5930 + ... + 7310.

It is an arithmetic number, because the mean of its divisors is an integer number (802942).

Almost surely, 2^9142220 is an apocalyptic number.

It is an amenable number.

9142220 is an abundant number, since it is smaller than the sum of its proper divisors (10128388).

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

9142220 is a wasteful number, since it uses less digits than its factorization.

9142220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721 (or 1719 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 9142220 is about 3023.6104246414. The cubic root of 9142220 is about 209.0983260244.

Adding to 9142220 its reverse (222419), we get a palindrome (9364639).

The spelling of 9142220 in words is "nine million, one hundred forty-two thousand, two hundred twenty".