1266234885 has 24 divisors (see below), whose sum is σ = 2323914840. Its totient is φ = 635599872.

The previous prime is 1266234883. The next prime is 1266234911. The reversal of 1266234885 is 5884326621.

1266234885 is a `hidden beast` number, since 12 + 6 + 623 + 4 + 8 + 8 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 560695041 + 705539844 = 23679^2 + 26562^2 .

It is not a de Polignac number, because 1266234885 - 2¹ = 1266234883 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1266234885.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266234881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 826840 + ... + 828369.

It is an arithmetic number, because the mean of its divisors is an integer number (96829785).

Almost surely, 2^1266234885 is an apocalyptic number.

1266234885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266234885 is a deficient number, since it is larger than the sum of its proper divisors (1057679955).

1266234885 is a wasteful number, since it uses less digits than its factorization.

1266234885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655237 (or 1655234 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 1266234885 is about 35584.1943143301. The cubic root of 1266234885 is about 1081.8608992372.

The spelling of 1266234885 in words is "one billion, two hundred sixty-six million, two hundred thirty-four thousand, eight hundred eighty-five".