2478321 has 12 divisors (see below), whose sum is σ = 3593460. Its totient is φ = 1645920.

The previous prime is 2478293. The next prime is 2478323. The reversal of 2478321 is 1238742.

2478321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1527696 + 950625 = 1236^2 + 975^2 .

It is not a de Polignac number, because 2478321 - 2⁶ = 2478257 is a prime.

It is a super-2 number, since 2×2478321² = 12284149958082, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2478323) 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 11 ways as a sum of consecutive naturals, for example, 4311 + ... + 4851.

It is an arithmetic number, because the mean of its divisors is an integer number (299455).

2^2478321 is an apocalyptic number.

It is an amenable number.

2478321 is a deficient number, since it is larger than the sum of its proper divisors (1115139).

2478321 is a wasteful number, since it uses less digits than its factorization.

2478321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1056 (or 1053 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 2478321 is about 1574.2684015123. The cubic root of 2478321 is about 135.3274356321.

The spelling of 2478321 in words is "two million, four hundred seventy-eight thousand, three hundred twenty-one".