13520249 has 2 divisors, whose sum is σ = 13520250. Its totient is φ = 13520248.

The previous prime is 13520239. The next prime is 13520279. The reversal of 13520249 is 94202531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11102224 + 2418025 = 3332^2 + 1555^2 .

It is a cyclic number.

It is not a de Polignac number, because 13520249 - 2⁴ = 13520233 is a prime.

It is not a weakly prime, because it can be changed into another prime (13520239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760124 + 6760125.

It is an arithmetic number, because the mean of its divisors is an integer number (6760125).

Almost surely, 2^13520249 is an apocalyptic number.

It is an amenable number.

13520249 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520249 is an equidigital number, since it uses as much as digits as its factorization.

13520249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 13520249 is about 3676.9891215504. The cubic root of 13520249 is about 238.2291475228.

The spelling of 13520249 in words is "thirteen million, five hundred twenty thousand, two hundred forty-nine".