2148321 has 8 divisors (see below), whose sum is σ = 3273664. Its totient is φ = 1227600.

The previous prime is 2148301. The next prime is 2148329. The reversal of 2148321 is 1238412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2148321 - 2¹⁰ = 2147297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 102301 = 2148321 / (2 + 1 + 4 + 8 + 3 + 2 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2148329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51130 + ... + 51171.

It is an arithmetic number, because the mean of its divisors is an integer number (409208).

2^2148321 is an apocalyptic number.

2148321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2148321 is a deficient number, since it is larger than the sum of its proper divisors (1125343).

2148321 is a wasteful number, since it uses less digits than its factorization.

2148321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102311.

The product of its digits is 384, while the sum is 21.

The square root of 2148321 is about 1465.7151837925. The cubic root of 2148321 is about 129.0326820625.

Subtracting from 2148321 its reverse (1238412), we obtain a palindrome (909909).

The spelling of 2148321 in words is "two million, one hundred forty-eight thousand, three hundred twenty-one".