13406121 has 16 divisors (see below), whose sum is σ = 19955520. Its totient is φ = 8894880.

The previous prime is 13406119. The next prime is 13406123. The reversal of 13406121 is 12160431.

It is a happy number.

13406121 is a `hidden beast` number, since 13 + 40 + 612 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (13406119) and next prime (13406123).

It is not a de Polignac number, because 13406121 - 2¹ = 13406119 is a prime.

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13406094 and 13406103.

It is not an unprimeable number, because it can be changed into a prime (13406123) 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 15 ways as a sum of consecutive naturals, for example, 5226 + ... + 7356.

It is an arithmetic number, because the mean of its divisors is an integer number (1247220).

Almost surely, 2^13406121 is an apocalyptic number.

It is an amenable number.

13406121 is a deficient number, since it is larger than the sum of its proper divisors (6549399).

13406121 is a wasteful number, since it uses less digits than its factorization.

13406121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2373 (or 2367 counting only the distinct ones).

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

The square root of 13406121 is about 3661.4370129773. The cubic root of 13406121 is about 237.5569340883.

Adding to 13406121 its reverse (12160431), we get a palindrome (25566552).

The spelling of 13406121 in words is "thirteen million, four hundred six thousand, one hundred twenty-one".