1266825600 has 144 divisors (see below), whose sum is σ = 4520426820. Its totient is φ = 337812480.

The previous prime is 1266825587. The next prime is 1266825611. The reversal of 1266825600 is 65286621.

1266825600 is a `hidden beast` number, since 1 + 26 + 6 + 8 + 25 + 600 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6807 + ... + 50793.

Almost surely, 2^1266825600 is an apocalyptic number.

1266825600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266825600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2260213410).

1266825600 is an abundant number, since it is smaller than the sum of its proper divisors (3253601220).

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

1266825600 is a wasteful number, since it uses less digits than its factorization.

1266825600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44017 (or 43997 counting only the distinct ones).

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

The square root of 1266825600 is about 35592.4935906435. The cubic root of 1266825600 is about 1082.0291071308.

The spelling of 1266825600 in words is "one billion, two hundred sixty-six million, eight hundred twenty-five thousand, six hundred".