1224865155385 has 4 divisors (see below), whose sum is σ = 1469838186468. Its totient is φ = 979892124304.

The previous prime is 1224865155341. The next prime is 1224865155401. The reversal of 1224865155385 is 5835515684221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 880872348304 + 343992807081 = 938548^2 + 586509^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224865155385 - 2⁷ = 1224865155257 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122486515534 + ... + 122486515543.

It is an arithmetic number, because the mean of its divisors is an integer number (367459546617).

Almost surely, 2^{1224865155385} is an apocalyptic number.

It is an amenable number.

1224865155385 is a deficient number, since it is larger than the sum of its proper divisors (244973031083).

1224865155385 is an equidigital number, since it uses as much as digits as its factorization.

1224865155385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244973031082.

The product of its digits is 11520000, while the sum is 55.

The spelling of 1224865155385 in words is "one trillion, two hundred twenty-four billion, eight hundred sixty-five million, one hundred fifty-five thousand, three hundred eighty-five".