1236530401 has 2 divisors, whose sum is σ = 1236530402. Its totient is φ = 1236530400.

The previous prime is 1236530303. The next prime is 1236530419. The reversal of 1236530401 is 1040356321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 819390625 + 417139776 = 28625^2 + 20424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1236530401 is a prime.

It is not a weakly prime, because it can be changed into another prime (1236530461) by changing a digit.

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 as a sum of consecutive naturals, namely, 618265200 + 618265201.

It is an arithmetic number, because the mean of its divisors is an integer number (618265201).

Almost surely, 2^1236530401 is an apocalyptic number.

It is an amenable number.

1236530401 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236530401 is an equidigital number, since it uses as much as digits as its factorization.

1236530401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1236530401 is about 35164.3342180682. The cubic root of 1236530401 is about 1073.3341137703.

Adding to 1236530401 its reverse (1040356321), we get a palindrome (2276886722).

The spelling of 1236530401 in words is "one billion, two hundred thirty-six million, five hundred thirty thousand, four hundred one".