1226401513 has 2 divisors, whose sum is σ = 1226401514. Its totient is φ = 1226401512.

The previous prime is 1226401511. The next prime is 1226401537. The reversal of 1226401513 is 3151046221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 982947904 + 243453609 = 31352^2 + 15603^2 .

It is an emirp because it is prime and its reverse (3151046221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1226401513 - 2¹ = 1226401511 is a prime.

Together with 1226401511, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1226401511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613200756 + 613200757.

It is an arithmetic number, because the mean of its divisors is an integer number (613200757).

Almost surely, 2^1226401513 is an apocalyptic number.

It is an amenable number.

1226401513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226401513 is an equidigital number, since it uses as much as digits as its factorization.

1226401513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1226401513 is about 35020.0158909159. The cubic root of 1226401513 is about 1070.3953798394.

Adding to 1226401513 its reverse (3151046221), we get a palindrome (4377447734).

The spelling of 1226401513 in words is "one billion, two hundred twenty-six million, four hundred one thousand, five hundred thirteen".