1224251005 has 16 divisors (see below), whose sum is σ = 1597564080. Its totient is φ = 896873472.

The previous prime is 1224250999. The next prime is 1224251051. The reversal of 1224251005 is 5001524221.

It can be written as a sum of positive squares in 8 ways, for example, as 580644 + 1223670361 = 762^2 + 34981^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224251005 - 2¹⁷ = 1224119933 is a prime.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 191490 + ... + 197779.

It is an arithmetic number, because the mean of its divisors is an integer number (99847755).

Almost surely, 2^1224251005 is an apocalyptic number.

It is an amenable number.

1224251005 is a deficient number, since it is larger than the sum of its proper divisors (373313075).

1224251005 is a wasteful number, since it uses less digits than its factorization.

1224251005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389328.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 1224251005 is about 34989.2984353788. The cubic root of 1224251005 is about 1069.7693639220.

Adding to 1224251005 its reverse (5001524221), we get a palindrome (6225775226).

The spelling of 1224251005 in words is "one billion, two hundred twenty-four million, two hundred fifty-one thousand, five".