9012921 has 4 divisors (see below), whose sum is σ = 12017232. Its totient is φ = 6008612.

The previous prime is 9012911. The next prime is 9012923. The reversal of 9012921 is 1292109.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9012921 - 2⁵ = 9012889 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 9012891 and 9012900.

It is not an unprimeable number, because it can be changed into a prime (9012923) 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 3 ways as a sum of consecutive naturals, for example, 1502151 + ... + 1502156.

It is an arithmetic number, because the mean of its divisors is an integer number (3004308).

Almost surely, 2^9012921 is an apocalyptic number.

It is an amenable number.

9012921 is a deficient number, since it is larger than the sum of its proper divisors (3004311).

9012921 is a wasteful number, since it uses less digits than its factorization.

9012921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004310.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 9012921 is about 3002.1527276273. The cubic root of 9012921 is about 208.1078782730.

The spelling of 9012921 in words is "nine million, twelve thousand, nine hundred twenty-one".