1266104385 has 96 divisors (see below), whose sum is σ = 2819940480. Its totient is φ = 534231936.

The previous prime is 1266104381. The next prime is 1266104407. The reversal of 1266104385 is 5834016621.

It is a happy number.

1266104385 is a `hidden beast` number, since 1 + 2 + 6 + 610 + 4 + 38 + 5 = 666.

It is not a de Polignac number, because 1266104385 - 2² = 1266104381 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1266104381) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 78634 + ... + 93356.

It is an arithmetic number, because the mean of its divisors is an integer number (29374380).

Almost surely, 2^1266104385 is an apocalyptic number.

1266104385 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1266104385 is an abundant number, since it is smaller than the sum of its proper divisors (1553836095).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1266104385 is a wasteful number, since it uses less digits than its factorization.

1266104385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14764 (or 14751 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1266104385 is about 35582.3605877969. The cubic root of 1266104385 is about 1081.8237319103.

The spelling of 1266104385 in words is "one billion, two hundred sixty-six million, one hundred four thousand, three hundred eighty-five".