1266270256 has 10 divisors (see below), whose sum is σ = 2453398652. Its totient is φ = 633135120.

The previous prime is 1266270253. The next prime is 1266270263. The reversal of 1266270256 is 6520726621.

It is a super-2 number, since 2×1266270256² = 3206880722460611072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1266270253) 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 as a sum of consecutive naturals, namely, 39570930 + ... + 39570961.

Almost surely, 2^1266270256 is an apocalyptic number.

1266270256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1266270256 is a deficient number, since it is larger than the sum of its proper divisors (1187128396).

1266270256 is an equidigital number, since it uses as much as digits as its factorization.

1266270256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79141899 (or 79141893 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 1266270256 is about 35584.6913152271. The cubic root of 1266270256 is about 1081.8709727094.

Adding to 1266270256 its reverse (6520726621), we get a palindrome (7786996877).

The spelling of 1266270256 in words is "one billion, two hundred sixty-six million, two hundred seventy thousand, two hundred fifty-six".