1266000256 has 32 divisors (see below), whose sum is σ = 2547107280. Its totient is φ = 626726400.

The previous prime is 1266000221. The next prime is 1266000257. The reversal of 1266000256 is 6520006621.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266000257) 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, 36036 + ... + 61891.

Almost surely, 2^1266000256 is an apocalyptic number.

1266000256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1266000256 is an abundant number, since it is smaller than the sum of its proper divisors (1281107024).

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

1266000256 is an equidigital number, since it uses as much as digits as its factorization.

1266000256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98042 (or 98030 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1266000256 is about 35580.8973467505. The cubic root of 1266000256 is about 1081.7940733995.

Adding to 1266000256 its reverse (6520006621), we get a palindrome (7786006877).

The spelling of 1266000256 in words is "one billion, two hundred sixty-six million, two hundred fifty-six", and thus it is an aban number.