13403421 has 16 divisors (see below), whose sum is σ = 20099520. Its totient is φ = 8826480.

The previous prime is 13403399. The next prime is 13403431. The reversal of 13403421 is 12430431.

It is not a de Polignac number, because 13403421 - 2¹³ = 13395229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13403394 and 13403403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13403431) 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 15 ways as a sum of consecutive naturals, for example, 750 + ... + 5231.

It is an arithmetic number, because the mean of its divisors is an integer number (1256220).

Almost surely, 2^13403421 is an apocalyptic number.

It is an amenable number.

13403421 is a deficient number, since it is larger than the sum of its proper divisors (6696099).

13403421 is an equidigital number, since it uses as much as digits as its factorization.

13403421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6073 (or 6067 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13403421 is about 3661.0682867163. The cubic root of 13403421 is about 237.5409849860.

Adding to 13403421 its reverse (12430431), we get a palindrome (25833852).

It can be divided in two parts, 13403 and 421, that added together give a cube (13824 = 24³).

The spelling of 13403421 in words is "thirteen million, four hundred three thousand, four hundred twenty-one".