2403421 has 4 divisors (see below), whose sum is σ = 2437344. Its totient is φ = 2369500.

The previous prime is 2403419. The next prime is 2403451. The reversal of 2403421 is 1243042.

2403421 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: 1243042 = 2 ⋅621521.

It is a cyclic number.

It is not a de Polignac number, because 2403421 - 2¹ = 2403419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2403395 and 2403404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2403451) 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, 16855 + ... + 16996.

It is an arithmetic number, because the mean of its divisors is an integer number (609336).

2^2403421 is an apocalyptic number.

It is an amenable number.

2403421 is a deficient number, since it is larger than the sum of its proper divisors (33923).

2403421 is an equidigital number, since it uses as much as digits as its factorization.

2403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33922.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 2403421 is about 1550.2970683066. The cubic root of 2403421 is about 133.9501745401.

Adding to 2403421 its reverse (1243042), we get a palindrome (3646463).

The spelling of 2403421 in words is "two million, four hundred three thousand, four hundred twenty-one".