1256126755047 has 16 divisors (see below), whose sum is σ = 1687573958400. Its totient is φ = 831052413632.

The previous prime is 1256126755033. The next prime is 1256126755061. The reversal of 1256126755047 is 7405576216521.

It is an interprime number because it is at equal distance from previous prime (1256126755033) and next prime (1256126755061).

It is a cyclic number.

It is not a de Polignac number, because 1256126755047 - 2¹⁴ = 1256126738663 is a prime.

It is a super-4 number, since 4×1256126755047⁴ (a number of 49 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1256126755087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 892678 + ... + 1819100.

It is an arithmetic number, because the mean of its divisors is an integer number (105473372400).

Almost surely, 2^{1256126755047} is an apocalyptic number.

1256126755047 is a deficient number, since it is larger than the sum of its proper divisors (431447203353).

1256126755047 is a wasteful number, since it uses less digits than its factorization.

1256126755047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929862.

The product of its (nonzero) digits is 3528000, while the sum is 51.

The spelling of 1256126755047 in words is "one trillion, two hundred fifty-six billion, one hundred twenty-six million, seven hundred fifty-five thousand, forty-seven".