13248409 has 2 divisors, whose sum is σ = 13248410. Its totient is φ = 13248408.

The previous prime is 13248397. The next prime is 13248413. The reversal of 13248409 is 90484231.

13248409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10220809 + 3027600 = 3197^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 13248409 - 2⁷ = 13248281 is a prime.

It is not a weakly prime, because it can be changed into another prime (13243409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6624204 + 6624205.

It is an arithmetic number, because the mean of its divisors is an integer number (6624205).

Almost surely, 2^13248409 is an apocalyptic number.

It is an amenable number.

13248409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13248409 is an equidigital number, since it uses as much as digits as its factorization.

13248409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 13248409 is about 3639.8363974223. The cubic root of 13248409 is about 236.6217029791.

Subtracting from 13248409 its sum of digits (31), we obtain a triangular number (13248378 = T₅₁₄₇).

The spelling of 13248409 in words is "thirteen million, two hundred forty-eight thousand, four hundred nine".