16348421 has 4 divisors (see below), whose sum is σ = 16398144. Its totient is φ = 16298700.

The previous prime is 16348403. The next prime is 16348481. The reversal of 16348421 is 12484361.

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: 12484361 = 3163 ⋅3947.

It is a cyclic number.

It is not a de Polignac number, because 16348421 - 2⁶ = 16348357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16348481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24365 + ... + 25026.

It is an arithmetic number, because the mean of its divisors is an integer number (4099536).

Almost surely, 2^16348421 is an apocalyptic number.

It is an amenable number.

16348421 is a deficient number, since it is larger than the sum of its proper divisors (49723).

16348421 is an equidigital number, since it uses as much as digits as its factorization.

16348421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49722.

The product of its digits is 4608, while the sum is 29.

The square root of 16348421 is about 4043.3180681218. The cubic root of 16348421 is about 253.8001869559.

It can be divided in two parts, 163 and 48421, that added together give a palindrome (48584).

The spelling of 16348421 in words is "sixteen million, three hundred forty-eight thousand, four hundred twenty-one".