1268881 has 2 divisors, whose sum is σ = 1268882. Its totient is φ = 1268880.

The previous prime is 1268867. The next prime is 1268899. The reversal of 1268881 is 1888621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 801025 + 467856 = 895^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 1268881 - 2⁵ = 1268849 is a prime.

It is a super-2 number, since 2×1268881² = 3220117984322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1268681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 634440 + 634441.

It is an arithmetic number, because the mean of its divisors is an integer number (634441).

2^1268881 is an apocalyptic number.

It is an amenable number.

1268881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1268881 is an equidigital number, since it uses as much as digits as its factorization.

1268881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6144, while the sum is 34.

The square root of 1268881 is about 1126.4461815817. The cubic root of 1268881 is about 108.2613981352.

It can be divided in two parts, 12688 and 81, that added together give a square (12769 = 113²).

The spelling of 1268881 in words is "one million, two hundred sixty-eight thousand, eight hundred eighty-one".