1256403043122 has 8 divisors (see below), whose sum is σ = 2512806086256. Its totient is φ = 418801014372.

The previous prime is 1256403043121. The next prime is 1256403043123. The reversal of 1256403043122 is 2213403046521.

It is an interprime number because it is at equal distance from previous prime (1256403043121) and next prime (1256403043123).

It is a sphenic number, since it is the product of 3 distinct primes.

1256403043122 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1256403043121) 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, 104700253588 + ... + 104700253599.

It is an arithmetic number, because the mean of its divisors is an integer number (314100760782).

Almost surely, 2^{1256403043122} is an apocalyptic number.

1256403043122 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1256403043122 is a wasteful number, since it uses less digits than its factorization.

1256403043122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209400507192.

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 1256403043122 its reverse (2213403046521), we get a palindrome (3469806089643).

The spelling of 1256403043122 in words is "one trillion, two hundred fifty-six billion, four hundred three million, forty-three thousand, one hundred twenty-two".