1255972787 has 2 divisors, whose sum is σ = 1255972788. Its totient is φ = 1255972786.

The previous prime is 1255972771. The next prime is 1255972793. The reversal of 1255972787 is 7872795521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1255972787 - 2⁴ = 1255972771 is a prime.

It is not a weakly prime, because it can be changed into another prime (1255972727) 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, 627986393 + 627986394.

It is an arithmetic number, because the mean of its divisors is an integer number (627986394).

Almost surely, 2^1255972787 is an apocalyptic number.

1255972787 is a deficient number, since it is larger than the sum of its proper divisors (1).

1255972787 is an equidigital number, since it uses as much as digits as its factorization.

1255972787 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2469600, while the sum is 53.

The square root of 1255972787 is about 35439.7063616503. The cubic root of 1255972787 is about 1078.9303501301.

The spelling of 1255972787 in words is "one billion, two hundred fifty-five million, nine hundred seventy-two thousand, seven hundred eighty-seven".