1256060563 has 4 divisors (see below), whose sum is σ = 1258090360. Its totient is φ = 1254030768.

The previous prime is 1256060539. The next prime is 1256060587. The reversal of 1256060563 is 3650606521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3650606521 = 2251 ⋅1621771.

It is an interprime number because it is at equal distance from previous prime (1256060539) and next prime (1256060587).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1256060563 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256060593) 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 in 3 ways as a sum of consecutive naturals, for example, 1013970 + ... + 1015207.

It is an arithmetic number, because the mean of its divisors is an integer number (314522590).

Almost surely, 2^1256060563 is an apocalyptic number.

1256060563 is a deficient number, since it is larger than the sum of its proper divisors (2029797).

1256060563 is an equidigital number, since it uses as much as digits as its factorization.

1256060563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2029796.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 1256060563 is about 35440.9447249929. The cubic root of 1256060563 is about 1078.9554838976.

The spelling of 1256060563 in words is "one billion, two hundred fifty-six million, sixty thousand, five hundred sixty-three".