13275421 has 2 divisors, whose sum is σ = 13275422. Its totient is φ = 13275420.

The previous prime is 13275401. The next prime is 13275481. The reversal of 13275421 is 12457231.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 416025 = 3586^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 13275421 - 2⁵ = 13275389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13275401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6637710 + 6637711.

It is an arithmetic number, because the mean of its divisors is an integer number (6637711).

Almost surely, 2^13275421 is an apocalyptic number.

It is an amenable number.

13275421 is a deficient number, since it is larger than the sum of its proper divisors (1).

13275421 is an equidigital number, since it uses as much as digits as its factorization.

13275421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1680, while the sum is 25.

The square root of 13275421 is about 3643.5451143083. The cubic root of 13275421 is about 236.7824087268.

The spelling of 13275421 in words is "thirteen million, two hundred seventy-five thousand, four hundred twenty-one".