1256730063 has 4 divisors (see below), whose sum is σ = 1675640088. Its totient is φ = 837820040.

The previous prime is 1256730043. The next prime is 1256730067. The reversal of 1256730063 is 3600376521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1256730063 - 2⁸ = 1256729807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256730067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 209455008 + ... + 209455013.

It is an arithmetic number, because the mean of its divisors is an integer number (418910022).

Almost surely, 2^1256730063 is an apocalyptic number.

1256730063 is a deficient number, since it is larger than the sum of its proper divisors (418910025).

1256730063 is an equidigital number, since it uses as much as digits as its factorization.

1256730063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418910024.

The product of its (nonzero) digits is 22680, while the sum is 33.

The square root of 1256730063 is about 35450.3887566836. The cubic root of 1256730063 is about 1079.1471499188.

The spelling of 1256730063 in words is "one billion, two hundred fifty-six million, seven hundred thirty thousand, sixty-three".