13815941 has 4 divisors (see below), whose sum is σ = 13824300. Its totient is φ = 13807584.

The previous prime is 13815937. The next prime is 13816013. The reversal of 13815941 is 14951831.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 14951831 = 43 ⋅347717.

It can be written as a sum of positive squares in 2 ways, for example, as 1635841 + 12180100 = 1279^2 + 3490^2 .

It is a cyclic number.

It is not a de Polignac number, because 13815941 - 2² = 13815937 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13815898 and 13815907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13845941) 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, 776 + ... + 5313.

It is an arithmetic number, because the mean of its divisors is an integer number (3456075).

Almost surely, 2^13815941 is an apocalyptic number.

It is an amenable number.

13815941 is a deficient number, since it is larger than the sum of its proper divisors (8359).

13815941 is an equidigital number, since it uses as much as digits as its factorization.

13815941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8358.

The product of its digits is 4320, while the sum is 32.

The square root of 13815941 is about 3716.9800914183. The cubic root of 13815941 is about 239.9533532028.

The spelling of 13815941 in words is "thirteen million, eight hundred fifteen thousand, nine hundred forty-one".