13106421 has 8 divisors (see below), whose sum is σ = 19416960. Its totient is φ = 8737596.

The previous prime is 13106417. The next prime is 13106453. The reversal of 13106421 is 12460131.

It is a happy number.

13106421 is a `hidden beast` number, since 13 + 10 + 642 + 1 = 666.

It is not a de Polignac number, because 13106421 - 2² = 13106417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13106394 and 13106403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13106411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242685 + ... + 242738.

It is an arithmetic number, because the mean of its divisors is an integer number (2427120).

Almost surely, 2^13106421 is an apocalyptic number.

It is an amenable number.

13106421 is a deficient number, since it is larger than the sum of its proper divisors (6310539).

13106421 is an equidigital number, since it uses as much as digits as its factorization.

13106421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 485432 (or 485426 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 13106421 is about 3620.2791328846. The cubic root of 13106421 is about 235.7733448235.

Adding to 13106421 its reverse (12460131), we get a palindrome (25566552).

The spelling of 13106421 in words is "thirteen million, one hundred six thousand, four hundred twenty-one".