13725247 has 2 divisors, whose sum is σ = 13725248. Its totient is φ = 13725246.

The previous prime is 13725233. The next prime is 13725259. The reversal of 13725247 is 74252731.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13725247 is a prime.

It is a super-2 number, since 2×13725247² = 376764810422018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13725287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6862623 + 6862624.

It is an arithmetic number, because the mean of its divisors is an integer number (6862624).

Almost surely, 2^13725247 is an apocalyptic number.

13725247 is a deficient number, since it is larger than the sum of its proper divisors (1).

13725247 is an equidigital number, since it uses as much as digits as its factorization.

13725247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11760, while the sum is 31.

The square root of 13725247 is about 3704.7600462108. The cubic root of 13725247 is about 239.4271464812.

Adding to 13725247 its reverse (74252731), we get a palindrome (87977978).

The spelling of 13725247 in words is "thirteen million, seven hundred twenty-five thousand, two hundred forty-seven".