1224265253509 has 2 divisors, whose sum is σ = 1224265253510. Its totient is φ = 1224265253508.

The previous prime is 1224265253423. The next prime is 1224265253543. The reversal of 1224265253509 is 9053525624221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1093116252484 + 131149001025 = 1045522^2 + 362145^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224265253509 - 2⁷ = 1224265253381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224265253009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612132626754 + 612132626755.

It is an arithmetic number, because the mean of its divisors is an integer number (612132626755).

Almost surely, 2^{1224265253509} is an apocalyptic number.

It is an amenable number.

1224265253509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224265253509 is an equidigital number, since it uses as much as digits as its factorization.

1224265253509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 1224265253509 in words is "one trillion, two hundred twenty-four billion, two hundred sixty-five million, two hundred fifty-three thousand, five hundred nine".