1224705649 has 16 divisors (see below), whose sum is σ = 1267488000. Its totient is φ = 1182740224.

The previous prime is 1224705631. The next prime is 1224705673. The reversal of 1224705649 is 9465074221.

It is a cyclic number.

It is not a de Polignac number, because 1224705649 - 2²⁷ = 1090487921 is a prime.

It is a super-2 number, since 2×1224705649² = 2999807853385022402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1224705749) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1253049 + ... + 1254025.

It is an arithmetic number, because the mean of its divisors is an integer number (79218000).

Almost surely, 2^1224705649 is an apocalyptic number.

It is an amenable number.

1224705649 is a deficient number, since it is larger than the sum of its proper divisors (42782351).

1224705649 is a wasteful number, since it uses less digits than its factorization.

1224705649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1352.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 1224705649 is about 34995.7947330819. The cubic root of 1224705649 is about 1069.9017725067.

The spelling of 1224705649 in words is "one billion, two hundred twenty-four million, seven hundred five thousand, six hundred forty-nine".