9121020 has 24 divisors (see below), whose sum is σ = 25539024. Its totient is φ = 2432256.

The previous prime is 9121019. The next prime is 9121033. The reversal of 9121020 is 201219.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75949 + ... + 76068.

It is an arithmetic number, because the mean of its divisors is an integer number (1064126).

Almost surely, 2^9121020 is an apocalyptic number.

It is an amenable number.

9121020 is an abundant number, since it is smaller than the sum of its proper divisors (16418004).

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

9121020 is a wasteful number, since it uses less digits than its factorization.

9121020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152029 (or 152027 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 9121020 is about 3020.1026472622. The cubic root of 9121020 is about 208.9365740858.

Adding to 9121020 its reverse (201219), we get a palindrome (9322239).

The spelling of 9121020 in words is "nine million, one hundred twenty-one thousand, twenty".