7140247 has 2 divisors, whose sum is σ = 7140248. Its totient is φ = 7140246.

The previous prime is 7140227. The next prime is 7140251. The reversal of 7140247 is 7420417.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7140247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7140227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3570123 + 3570124.

It is an arithmetic number, because the mean of its divisors is an integer number (3570124).

Almost surely, 2^7140247 is an apocalyptic number.

7140247 is a deficient number, since it is larger than the sum of its proper divisors (1).

7140247 is an equidigital number, since it uses as much as digits as its factorization.

7140247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 7140247 is about 2672.1240614912. The cubic root of 7140247 is about 192.5622174779.

The spelling of 7140247 in words is "seven million, one hundred forty thousand, two hundred forty-seven".