1266255211 has 8 divisors (see below), whose sum is σ = 1369321184. Its totient is φ = 1163998080.

The previous prime is 1266255197. The next prime is 1266255229. The reversal of 1266255211 is 1125526621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1266255211 - 2¹³ = 1266247019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1266255511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198951 + ... + 205216.

It is an arithmetic number, because the mean of its divisors is an integer number (171165148).

Almost surely, 2^1266255211 is an apocalyptic number.

1266255211 is a deficient number, since it is larger than the sum of its proper divisors (103065973).

1266255211 is a wasteful number, since it uses less digits than its factorization.

1266255211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404421.

The product of its digits is 7200, while the sum is 31.

The square root of 1266255211 is about 35584.4799175146. The cubic root of 1266255211 is about 1081.8666879965.

The spelling of 1266255211 in words is "one billion, two hundred sixty-six million, two hundred fifty-five thousand, two hundred eleven".