7281247 has 2 divisors, whose sum is σ = 7281248. Its totient is φ = 7281246.

The previous prime is 7281229. The next prime is 7281251. The reversal of 7281247 is 7421827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7281247 - 2¹¹ = 7279199 is a prime.

It is a nialpdrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7281257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3640623 + 3640624.

It is an arithmetic number, because the mean of its divisors is an integer number (3640624).

Almost surely, 2^7281247 is an apocalyptic number.

7281247 is a deficient number, since it is larger than the sum of its proper divisors (1).

7281247 is an equidigital number, since it uses as much as digits as its factorization.

7281247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 31.

The square root of 7281247 is about 2698.3785872260. The cubic root of 7281247 is about 193.8214870440.

The spelling of 7281247 in words is "seven million, two hundred eighty-one thousand, two hundred forty-seven".