13555247 has 2 divisors, whose sum is σ = 13555248. Its totient is φ = 13555246.

The previous prime is 13555231. The next prime is 13555259. The reversal of 13555247 is 74255531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13555247 - 2⁴ = 13555231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13555147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6777623 + 6777624.

It is an arithmetic number, because the mean of its divisors is an integer number (6777624).

Almost surely, 2^13555247 is an apocalyptic number.

13555247 is a deficient number, since it is larger than the sum of its proper divisors (1).

13555247 is an equidigital number, since it uses as much as digits as its factorization.

13555247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 32.

The square root of 13555247 is about 3681.7451025295. The cubic root of 13555247 is about 238.4345273682.

It can be divided in two parts, 1355524 and 7, that added together give a palindrome (1355531).

The spelling of 13555247 in words is "thirteen million, five hundred fifty-five thousand, two hundred forty-seven".