1236000641 has 2 divisors, whose sum is σ = 1236000642. Its totient is φ = 1236000640.

The previous prime is 1236000613. The next prime is 1236000697. The reversal of 1236000641 is 1460006321.

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., 790790641 + 445210000 = 28121^2 + 21100^2 .

It is a cyclic number.

It is not a de Polignac number, because 1236000641 - 2¹⁰ = 1235999617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1236000341) 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, 618000320 + 618000321.

It is an arithmetic number, because the mean of its divisors is an integer number (618000321).

Almost surely, 2^1236000641 is an apocalyptic number.

It is an amenable number.

1236000641 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236000641 is an equidigital number, since it uses as much as digits as its factorization.

1236000641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1236000641 is about 35156.8007787967. The cubic root of 1236000641 is about 1073.1808109748.

Adding to 1236000641 its reverse (1460006321), we get a palindrome (2696006962).

The spelling of 1236000641 in words is "one billion, two hundred thirty-six million, six hundred forty-one", and thus it is an aban number.