1255456729 has 2 divisors, whose sum is σ = 1255456730. Its totient is φ = 1255456728.

The previous prime is 1255456717. The next prime is 1255456747. The reversal of 1255456729 is 9276545521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1255072329 + 384400 = 35427^2 + 620^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1255456729 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255456789) 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, 627728364 + 627728365.

It is an arithmetic number, because the mean of its divisors is an integer number (627728365).

Almost surely, 2^1255456729 is an apocalyptic number.

It is an amenable number.

1255456729 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255456729 is an equidigital number, since it uses as much as digits as its factorization.

1255456729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 46.

The square root of 1255456729 is about 35432.4248252924. The cubic root of 1255456729 is about 1078.7825584686.

The spelling of 1255456729 in words is "one billion, two hundred fifty-five million, four hundred fifty-six thousand, seven hundred twenty-nine".