1212826513 has 2 divisors, whose sum is σ = 1212826514. Its totient is φ = 1212826512.

The previous prime is 1212826499. The next prime is 1212826577. The reversal of 1212826513 is 3156282121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 716739984 + 496086529 = 26772^2 + 22273^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212826513 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212826213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606413256 + 606413257.

It is an arithmetic number, because the mean of its divisors is an integer number (606413257).

Almost surely, 2^1212826513 is an apocalyptic number.

It is an amenable number.

1212826513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212826513 is an equidigital number, since it uses as much as digits as its factorization.

1212826513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 31.

The square root of 1212826513 is about 34825.6588308104. The cubic root of 1212826513 is about 1066.4313266720.

The spelling of 1212826513 in words is "one billion, two hundred twelve million, eight hundred twenty-six thousand, five hundred thirteen".