1235131259 has 2 divisors, whose sum is σ = 1235131260. Its totient is φ = 1235131258.

The previous prime is 1235131229. The next prime is 1235131279. The reversal of 1235131259 is 9521315321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1235131259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1235131229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 617565629 + 617565630.

It is an arithmetic number, because the mean of its divisors is an integer number (617565630).

Almost surely, 2^1235131259 is an apocalyptic number.

1235131259 is a deficient number, since it is larger than the sum of its proper divisors (1).

1235131259 is an equidigital number, since it uses as much as digits as its factorization.

1235131259 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 1235131259 is about 35144.4342535201. The cubic root of 1235131259 is about 1072.9291328642.

The spelling of 1235131259 in words is "one billion, two hundred thirty-five million, one hundred thirty-one thousand, two hundred fifty-nine".