1224555345 has 24 divisors (see below), whose sum is σ = 2285837736. Its totient is φ = 602857728.

The previous prime is 1224555337. The next prime is 1224555383. The reversal of 1224555345 is 5435554221.

1224555345 is a `hidden beast` number, since 1 + 22 + 45 + 553 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 65561409 + 1158993936 = 8097^2 + 34044^2 .

It is not a de Polignac number, because 1224555345 - 2³ = 1224555337 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1046044 + ... + 1047213.

It is an arithmetic number, because the mean of its divisors is an integer number (95243239).

Almost surely, 2^1224555345 is an apocalyptic number.

1224555345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1224555345 is a deficient number, since it is larger than the sum of its proper divisors (1061282391).

1224555345 is a wasteful number, since it uses less digits than its factorization.

1224555345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093281 (or 2093278 counting only the distinct ones).

The product of its digits is 120000, while the sum is 36.

The square root of 1224555345 is about 34993.6472091721. The cubic root of 1224555345 is about 1069.8580022356.

The spelling of 1224555345 in words is "one billion, two hundred twenty-four million, five hundred fifty-five thousand, three hundred forty-five".