13412421 has 12 divisors (see below), whose sum is σ = 21134880. Its totient is φ = 8128680.

The previous prime is 13412407. The next prime is 13412447. The reversal of 13412421 is 12421431.

It is not a de Polignac number, because 13412421 - 2²² = 9218117 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13412394 and 13412403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13412221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67641 + ... + 67838.

It is an arithmetic number, because the mean of its divisors is an integer number (1761240).

Almost surely, 2^13412421 is an apocalyptic number.

13412421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13412421 is a deficient number, since it is larger than the sum of its proper divisors (7722459).

13412421 is a wasteful number, since it uses less digits than its factorization.

13412421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135496 (or 135493 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 13412421 is about 3662.2972298818. The cubic root of 13412421 is about 237.5941403344.

Adding to 13412421 its reverse (12421431), we get a palindrome (25833852).

The spelling of 13412421 in words is "thirteen million, four hundred twelve thousand, four hundred twenty-one".