1266256 has 20 divisors (see below), whose sum is σ = 2538900. Its totient is φ = 611072.
The previous prime is 1266247. The next prime is 1266259. The reversal of 1266256 is 6526621.
1266256 = 752 + 762 + ... + 1612.
It can be written as a sum of positive squares in 2 ways, for example, as 1000000 + 266256 = 1000^2 + 516^2 .
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (1266259) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901 + ... + 1828.
It is an arithmetic number, because the mean of its divisors is an integer number (126945).
21266256 is an apocalyptic number.
1266256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.
It is an amenable number.
1266256 is an abundant number, since it is smaller than the sum of its proper divisors (1272644).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
1266256 is a wasteful number, since it uses less digits than its factorization.
1266256 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2766 (or 2760 counting only the distinct ones).
The product of its digits is 4320, while the sum is 28.
The square root of 1266256 is about 1125.2804094980. The cubic root of 1266256 is about 108.1866912699.
The spelling of 1266256 in words is "one million, two hundred sixty-six thousand, two hundred fifty-six".
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