1259231257 has 2 divisors, whose sum is σ = 1259231258. Its totient is φ = 1259231256.

The previous prime is 1259231231. The next prime is 1259231287. The reversal of 1259231257 is 7521329521.

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., 796594176 + 462637081 = 28224^2 + 21509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1259231257 is a prime.

It is not a weakly prime, because it can be changed into another prime (1259231227) 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, 629615628 + 629615629.

It is an arithmetic number, because the mean of its divisors is an integer number (629615629).

Almost surely, 2^1259231257 is an apocalyptic number.

It is an amenable number.

1259231257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1259231257 is an equidigital number, since it uses as much as digits as its factorization.

1259231257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37800, while the sum is 37.

The square root of 1259231257 is about 35485.6486061619. The cubic root of 1259231257 is about 1079.8625959739.

The spelling of 1259231257 in words is "one billion, two hundred fifty-nine million, two hundred thirty-one thousand, two hundred fifty-seven".