1213531259 has 2 divisors, whose sum is σ = 1213531260. Its totient is φ = 1213531258.

The previous prime is 1213531223. The next prime is 1213531321. The reversal of 1213531259 is 9521353121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1213531259 - 2⁸ = 1213531003 is a prime.

It is not a weakly prime, because it can be changed into another prime (1213521259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606765629 + 606765630.

It is an arithmetic number, because the mean of its divisors is an integer number (606765630).

Almost surely, 2^1213531259 is an apocalyptic number.

1213531259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213531259 is an equidigital number, since it uses as much as digits as its factorization.

1213531259 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8100, while the sum is 32.

The square root of 1213531259 is about 34835.7755619134. The cubic root of 1213531259 is about 1066.6378463676.

The spelling of 1213531259 in words is "one billion, two hundred thirteen million, five hundred thirty-one thousand, two hundred fifty-nine".