1256231315 has 8 divisors (see below), whose sum is σ = 1509314208. Its totient is φ = 1003760640.

The previous prime is 1256231279. The next prime is 1256231323. The reversal of 1256231315 is 5131326521.

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

It is not a de Polignac number, because 1256231315 - 2⁸ = 1256231059 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 148526 + ... + 156755.

It is an arithmetic number, because the mean of its divisors is an integer number (188664276).

Almost surely, 2^1256231315 is an apocalyptic number.

1256231315 is a deficient number, since it is larger than the sum of its proper divisors (253082893).

1256231315 is an equidigital number, since it uses as much as digits as its factorization.

1256231315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306109.

The product of its digits is 5400, while the sum is 29.

The square root of 1256231315 is about 35443.3536082578. The cubic root of 1256231315 is about 1079.0043736472.

Adding to 1256231315 its reverse (5131326521), we get a palindrome (6387557836).

The spelling of 1256231315 in words is "one billion, two hundred fifty-six million, two hundred thirty-one thousand, three hundred fifteen".