1240247 has 2 divisors, whose sum is σ = 1240248. Its totient is φ = 1240246.

The previous prime is 1240241. The next prime is 1240271. The reversal of 1240247 is 7420421.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1240247 - 2⁴ = 1240231 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1240241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 620123 + 620124.

It is an arithmetic number, because the mean of its divisors is an integer number (620124).

2^1240247 is an apocalyptic number.

1240247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1240247 is an equidigital number, since it uses as much as digits as its factorization.

1240247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 1240247 is about 1113.6637733176. The cubic root of 1240247 is about 107.4408399924.

Adding to 1240247 its reverse (7420421), we get a palindrome (8660668).

The spelling of 1240247 in words is "one million, two hundred forty thousand, two hundred forty-seven".