13121814 has 8 divisors (see below), whose sum is σ = 26243640. Its totient is φ = 4373936.

The previous prime is 13121813. The next prime is 13121827. The reversal of 13121814 is 41812131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

13121814 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13121813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1093479 + ... + 1093490.

It is an arithmetic number, because the mean of its divisors is an integer number (3280455).

Almost surely, 2^13121814 is an apocalyptic number.

13121814 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13121814 is a wasteful number, since it uses less digits than its factorization.

13121814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2186974.

The product of its digits is 192, while the sum is 21.

The square root of 13121814 is about 3622.4044500856. The cubic root of 13121814 is about 235.8656110293.

Adding to 13121814 its reverse (41812131), we get a palindrome (54933945).

It can be divided in two parts, 131 and 21814, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 13121814 in words is "thirteen million, one hundred twenty-one thousand, eight hundred fourteen".