1266281 has 2 divisors, whose sum is σ = 1266282. Its totient is φ = 1266280.

The previous prime is 1266277. The next prime is 1266301. The reversal of 1266281 is 1826621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1254400 + 11881 = 1120^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 1266281 - 2² = 1266277 is a prime.

It is a super-2 number, since 2×1266281² = 3206935141922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1266281.

It is not a weakly prime, because it can be changed into another prime (1266241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633140 + 633141.

It is an arithmetic number, because the mean of its divisors is an integer number (633141).

2^1266281 is an apocalyptic number.

It is an amenable number.

1266281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1266281 is an equidigital number, since it uses as much as digits as its factorization.

1266281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 26.

The square root of 1266281 is about 1125.2915177855. The cubic root of 1266281 is about 108.1874032506.

It can be divided in two parts, 1266 and 281, that multiplied together give a triangular number (355746 = T₈₄₃).

The spelling of 1266281 in words is "one million, two hundred sixty-six thousand, two hundred eighty-one".