7257947 has 2 divisors, whose sum is σ = 7257948. Its totient is φ = 7257946.

The previous prime is 7257941. The next prime is 7257989. The reversal of 7257947 is 7497527.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7257947 - 2¹⁸ = 6995803 is a prime.

It is a d-powerful number, because it can be written as 7⁷ + 2⁷ + 5³ + 7⁷ + 9⁷ + 4⁶ + 7⁷ .

It is not a weakly prime, because it can be changed into another prime (7257941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3628973 + 3628974.

It is an arithmetic number, because the mean of its divisors is an integer number (3628974).

Almost surely, 2^7257947 is an apocalyptic number.

7257947 is a deficient number, since it is larger than the sum of its proper divisors (1).

7257947 is an equidigital number, since it uses as much as digits as its factorization.

7257947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 123480, while the sum is 41.

The square root of 7257947 is about 2694.0577202428. The cubic root of 7257947 is about 193.6145231205.

The spelling of 7257947 in words is "seven million, two hundred fifty-seven thousand, nine hundred forty-seven".