9648021 has 4 divisors (see below), whose sum is σ = 12864032. Its totient is φ = 6432012.

The previous prime is 9648011. The next prime is 9648031. The reversal of 9648021 is 1208469.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1208469 = 3 ⋅402823.

It is an interprime number because it is at equal distance from previous prime (9648011) and next prime (9648031).

It is not a de Polignac number, because 9648021 - 2⁷ = 9647893 is a prime.

It is a Duffinian number.

9648021 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9648021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9648011) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1608001 + ... + 1608006.

It is an arithmetic number, because the mean of its divisors is an integer number (3216008).

Almost surely, 2^9648021 is an apocalyptic number.

It is an amenable number.

9648021 is a deficient number, since it is larger than the sum of its proper divisors (3216011).

9648021 is a wasteful number, since it uses less digits than its factorization.

9648021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3216010.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 9648021 is about 3106.1263657488. The cubic root of 9648021 is about 212.8854990847.

The spelling of 9648021 in words is "nine million, six hundred forty-eight thousand, twenty-one".