13420406 has 4 divisors (see below), whose sum is σ = 20130612. Its totient is φ = 6710202.

The previous prime is 13420397. The next prime is 13420453. The reversal of 13420406 is 60402431.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3355100 + ... + 3355103.

It is an arithmetic number, because the mean of its divisors is an integer number (5032653).

Almost surely, 2^13420406 is an apocalyptic number.

13420406 is a deficient number, since it is larger than the sum of its proper divisors (6710206).

13420406 is an equidigital number, since it uses as much as digits as its factorization.

13420406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6710205.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 13420406 is about 3663.3872304194. The cubic root of 13420406 is about 237.6412810368.

Adding to 13420406 its reverse (60402431), we get a palindrome (73822837).

The spelling of 13420406 in words is "thirteen million, four hundred twenty thousand, four hundred six".