13921241 has 2 divisors, whose sum is σ = 13921242. Its totient is φ = 13921240.

The previous prime is 13921231. The next prime is 13921289. The reversal of 13921241 is 14212931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12931216 + 990025 = 3596^2 + 995^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13921241 is a prime.

It is not a weakly prime, because it can be changed into another prime (13921211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6960620 + 6960621.

It is an arithmetic number, because the mean of its divisors is an integer number (6960621).

Almost surely, 2^13921241 is an apocalyptic number.

It is an amenable number.

13921241 is a deficient number, since it is larger than the sum of its proper divisors (1).

13921241 is an equidigital number, since it uses as much as digits as its factorization.

13921241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 23.

The square root of 13921241 is about 3731.1179289859. The cubic root of 13921241 is about 240.5614229290.

The spelling of 13921241 in words is "thirteen million, nine hundred twenty-one thousand, two hundred forty-one".