9724121 has 4 divisors (see below), whose sum is σ = 10608144. Its totient is φ = 8840100.

The previous prime is 9724103. The next prime is 9724129. The reversal of 9724121 is 1214279.

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 a de Polignac number, because none of the positive numbers 2^k-9724121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9724129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 441995 + ... + 442016.

It is an arithmetic number, because the mean of its divisors is an integer number (2652036).

Almost surely, 2^9724121 is an apocalyptic number.

It is an amenable number.

9724121 is a deficient number, since it is larger than the sum of its proper divisors (884023).

9724121 is a wasteful number, since it uses less digits than its factorization.

9724121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884022.

The product of its digits is 1008, while the sum is 26.

The square root of 9724121 is about 3118.3522892707. The cubic root of 9724121 is about 213.4437544140.

The spelling of 9724121 in words is "nine million, seven hundred twenty-four thousand, one hundred twenty-one".