1256793353 has 4 divisors (see below), whose sum is σ = 1258454340. Its totient is φ = 1255132368.

The previous prime is 1256793299. The next prime is 1256793359. The reversal of 1256793353 is 3533976521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3533976521 = 14771 ⋅239251.

It can be written as a sum of positive squares in 2 ways, for example, as 346443769 + 910349584 = 18613^2 + 30172^2 .

It is a cyclic number.

It is not a de Polignac number, because 1256793353 - 2¹⁸ = 1256531209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1256793359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 829358 + ... + 830871.

It is an arithmetic number, because the mean of its divisors is an integer number (314613585).

Almost surely, 2^1256793353 is an apocalyptic number.

It is an amenable number.

1256793353 is a deficient number, since it is larger than the sum of its proper divisors (1660987).

1256793353 is an equidigital number, since it uses as much as digits as its factorization.

1256793353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660986.

The product of its digits is 510300, while the sum is 44.

The square root of 1256793353 is about 35451.2814013824. The cubic root of 1256793353 is about 1079.1652652056.

The spelling of 1256793353 in words is "one billion, two hundred fifty-six million, seven hundred ninety-three thousand, three hundred fifty-three".