1256267255 has 8 divisors (see below), whose sum is σ = 1528753824. Its totient is φ = 990858400.

The previous prime is 1256267249. The next prime is 1256267261. The reversal of 1256267255 is 5527626521.

It is an interprime number because it is at equal distance from previous prime (1256267249) and next prime (1256267261).

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

It is not a de Polignac number, because 1256267255 - 2⁴ = 1256267239 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1769036 + ... + 1769745.

It is an arithmetic number, because the mean of its divisors is an integer number (191094228).

Almost surely, 2^1256267255 is an apocalyptic number.

1256267255 is a deficient number, since it is larger than the sum of its proper divisors (272486569).

1256267255 is an equidigital number, since it uses as much as digits as its factorization.

1256267255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3538857.

The product of its digits is 252000, while the sum is 41.

The square root of 1256267255 is about 35443.8606108308. The cubic root of 1256267255 is about 1079.0146634314.

The spelling of 1256267255 in words is "one billion, two hundred fifty-six million, two hundred sixty-seven thousand, two hundred fifty-five".