13198257 has 6 divisors (see below), whose sum is σ = 19064162. Its totient is φ = 8798832.

The previous prime is 13198249. The next prime is 13198259. The reversal of 13198257 is 75289131.

13198257 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 7834401 + 5363856 = 2799^2 + 2316^2 .

It is not a de Polignac number, because 13198257 - 2³ = 13198249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13198259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 733228 + ... + 733245.

Almost surely, 2^13198257 is an apocalyptic number.

It is an amenable number.

13198257 is a deficient number, since it is larger than the sum of its proper divisors (5865905).

13198257 is a wasteful number, since it uses less digits than its factorization.

13198257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466479 (or 1466476 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 13198257 is about 3632.9405445176. The cubic root of 13198257 is about 236.3227473962.

The spelling of 13198257 in words is "thirteen million, one hundred ninety-eight thousand, two hundred fifty-seven".