1305247 has 2 divisors, whose sum is σ = 1305248. Its totient is φ = 1305246.

The previous prime is 1305233. The next prime is 1305251. The reversal of 1305247 is 7425031.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1305247 - 2¹¹ = 1303199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652623 + 652624.

It is an arithmetic number, because the mean of its divisors is an integer number (652624).

2^1305247 is an apocalyptic number.

1305247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305247 is an equidigital number, since it uses as much as digits as its factorization.

1305247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 1305247 is about 1142.4740697276. The cubic root of 1305247 is about 109.2859255187.

The spelling of 1305247 in words is "one million, three hundred five thousand, two hundred forty-seven".