1224545137 has 2 divisors, whose sum is σ = 1224545138. Its totient is φ = 1224545136.

The previous prime is 1224545123. The next prime is 1224545209. The reversal of 1224545137 is 7315454221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1082673216 + 141871921 = 32904^2 + 11911^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224545137 - 2⁷ = 1224545009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1224545837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612272568 + 612272569.

It is an arithmetic number, because the mean of its divisors is an integer number (612272569).

Almost surely, 2^1224545137 is an apocalyptic number.

It is an amenable number.

1224545137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224545137 is an equidigital number, since it uses as much as digits as its factorization.

1224545137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 34.

The square root of 1224545137 is about 34993.5013538228. The cubic root of 1224545137 is about 1069.8550294175.

Adding to 1224545137 its reverse (7315454221), we get a palindrome (8539999358).

The spelling of 1224545137 in words is "one billion, two hundred twenty-four million, five hundred forty-five thousand, one hundred thirty-seven".