13810421 has 2 divisors, whose sum is σ = 13810422. Its totient is φ = 13810420.

The previous prime is 13810403. The next prime is 13810427. The reversal of 13810421 is 12401831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10817521 + 2992900 = 3289^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 13810421 - 2¹⁴ = 13794037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13810393 and 13810402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13810427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6905210 + 6905211.

It is an arithmetic number, because the mean of its divisors is an integer number (6905211).

Almost surely, 2^13810421 is an apocalyptic number.

It is an amenable number.

13810421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13810421 is an equidigital number, since it uses as much as digits as its factorization.

13810421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 13810421 is about 3716.2374789564. The cubic root of 13810421 is about 239.9213920802.

The spelling of 13810421 in words is "thirteen million, eight hundred ten thousand, four hundred twenty-one".