1226272657 has 2 divisors, whose sum is σ = 1226272658. Its totient is φ = 1226272656.

The previous prime is 1226272637. The next prime is 1226272699. The reversal of 1226272657 is 7562726221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 873734481 + 352538176 = 29559^2 + 18776^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226272657 - 2¹¹ = 1226270609 is a prime.

It is not a weakly prime, because it can be changed into another prime (1226272637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613136328 + 613136329.

It is an arithmetic number, because the mean of its divisors is an integer number (613136329).

Almost surely, 2^1226272657 is an apocalyptic number.

It is an amenable number.

1226272657 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226272657 is an equidigital number, since it uses as much as digits as its factorization.

1226272657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141120, while the sum is 40.

The square root of 1226272657 is about 35018.1760947083. The cubic root of 1226272657 is about 1070.3578902960.

Adding to 1226272657 its reverse (7562726221), we get a palindrome (8788998878).

The spelling of 1226272657 in words is "one billion, two hundred twenty-six million, two hundred seventy-two thousand, six hundred fifty-seven".