1256322124829 has 2 divisors, whose sum is σ = 1256322124830. Its totient is φ = 1256322124828.

The previous prime is 1256322124789. The next prime is 1256322124847. The reversal of 1256322124829 is 9284212236521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1249984372729 + 6337752100 = 1118027^2 + 79610^2 .

It is an emirp because it is prime and its reverse (9284212236521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1256322124829 - 2⁸ = 1256322124573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1256322124879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 628161062414 + 628161062415.

It is an arithmetic number, because the mean of its divisors is an integer number (628161062415).

Almost surely, 2^{1256322124829} is an apocalyptic number.

It is an amenable number.

1256322124829 is a deficient number, since it is larger than the sum of its proper divisors (1).

1256322124829 is an equidigital number, since it uses as much as digits as its factorization.

1256322124829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 829440, while the sum is 47.

The spelling of 1256322124829 in words is "one trillion, two hundred fifty-six billion, three hundred twenty-two million, one hundred twenty-four thousand, eight hundred twenty-nine".