2405321 has 4 divisors (see below), whose sum is σ = 2482944. Its totient is φ = 2327700.

The previous prime is 2405311. The next prime is 2405327. The reversal of 2405321 is 1235042.

2405321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 1235042 = 2 ⋅617521.

It is a cyclic number.

It is not a de Polignac number, because 2405321 - 2¹⁸ = 2143177 is a prime.

It is a super-2 number, since 2×2405321² = 11571138226082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2405321.

It is not an unprimeable number, because it can be changed into a prime (2405327) 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, 38765 + ... + 38826.

It is an arithmetic number, because the mean of its divisors is an integer number (620736).

2^2405321 is an apocalyptic number.

It is an amenable number.

2405321 is a deficient number, since it is larger than the sum of its proper divisors (77623).

2405321 is an equidigital number, since it uses as much as digits as its factorization.

2405321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77622.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2405321 is about 1550.9097330277. The cubic root of 2405321 is about 133.9854628917.

The spelling of 2405321 in words is "two million, four hundred five thousand, three hundred twenty-one".