1220041247 has 2 divisors, whose sum is σ = 1220041248. Its totient is φ = 1220041246.

The previous prime is 1220041213. The next prime is 1220041253. The reversal of 1220041247 is 7421400221.

It is a strong prime.

It is an emirp because it is prime and its reverse (7421400221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1220041247 - 2⁶ = 1220041183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1220041747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610020623 + 610020624.

It is an arithmetic number, because the mean of its divisors is an integer number (610020624).

Almost surely, 2^1220041247 is an apocalyptic number.

1220041247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220041247 is an equidigital number, since it uses as much as digits as its factorization.

1220041247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 1220041247 is about 34929.0888372428. The cubic root of 1220041247 is about 1068.5417719929.

Adding to 1220041247 its reverse (7421400221), we get a palindrome (8641441468).

The spelling of 1220041247 in words is "one billion, two hundred twenty million, forty-one thousand, two hundred forty-seven".