1226511137 has 2 divisors, whose sum is σ = 1226511138. Its totient is φ = 1226511136.

The previous prime is 1226511109. The next prime is 1226511197. The reversal of 1226511137 is 7311156221.

1226511137 is nontrivially palindromic in base 11.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 741146176 + 485364961 = 27224^2 + 22031^2 .

It is a cyclic number.

It is not a de Polignac number, because 1226511137 - 2⁶ = 1226511073 is a prime.

It is not a weakly prime, because it can be changed into another prime (1226511197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613255568 + 613255569.

It is an arithmetic number, because the mean of its divisors is an integer number (613255569).

Almost surely, 2^1226511137 is an apocalyptic number.

It is an amenable number.

1226511137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226511137 is an equidigital number, since it uses as much as digits as its factorization.

1226511137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2520, while the sum is 29.

The square root of 1226511137 is about 35021.5810179952. The cubic root of 1226511137 is about 1070.4272719307.

Adding to 1226511137 its reverse (7311156221), we get a palindrome (8537667358).

The spelling of 1226511137 in words is "one billion, two hundred twenty-six million, five hundred eleven thousand, one hundred thirty-seven".