1256064047 has 4 divisors (see below), whose sum is σ = 1435501776. Its totient is φ = 1076626320.

The previous prime is 1256064011. The next prime is 1256064071. The reversal of 1256064047 is 7404606521.

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

It is not a de Polignac number, because 1256064047 - 2¹⁰ = 1256063023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1256063998 and 1256064016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256064097) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89718854 + ... + 89718867.

It is an arithmetic number, because the mean of its divisors is an integer number (358875444).

Almost surely, 2^1256064047 is an apocalyptic number.

1256064047 is a deficient number, since it is larger than the sum of its proper divisors (179437729).

1256064047 is an equidigital number, since it uses as much as digits as its factorization.

1256064047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179437728.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 1256064047 is about 35440.9938771474. The cubic root of 1256064047 is about 1078.9564814815.

The spelling of 1256064047 in words is "one billion, two hundred fifty-six million, sixty-four thousand, forty-seven".