9123521 has 6 divisors (see below), whose sum is σ = 10028466. Its totient is φ = 8294000.

The previous prime is 9123511. The next prime is 9123533. The reversal of 9123521 is 1253219.

It can be written as a sum of positive squares in only one way, i.e., 7263025 + 1860496 = 2695^2 + 1364^2 .

It is not a de Polignac number, because 9123521 - 2¹⁰ = 9122497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9123511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 37580 + ... + 37821.

It is an arithmetic number, because the mean of its divisors is an integer number (1671411).

Almost surely, 2^9123521 is an apocalyptic number.

It is an amenable number.

9123521 is a deficient number, since it is larger than the sum of its proper divisors (904945).

9123521 is a wasteful number, since it uses less digits than its factorization.

9123521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75423 (or 75412 counting only the distinct ones).

The product of its digits is 540, while the sum is 23.

The square root of 9123521 is about 3020.5166776563. The cubic root of 9123521 is about 208.9556692681.

The spelling of 9123521 in words is "nine million, one hundred twenty-three thousand, five hundred twenty-one".