1265005168 has 120 divisors (see below), whose sum is σ = 2924879760. Its totient is φ = 528353280.

The previous prime is 1265005151. The next prime is 1265005169. The reversal of 1265005168 is 8615005621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265005169) 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, 9656463 + ... + 9656593.

It is an arithmetic number, because the mean of its divisors is an integer number (24373998).

Almost surely, 2^1265005168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1265005168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1462439880).

1265005168 is an abundant number, since it is smaller than the sum of its proper divisors (1659874592).

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

1265005168 is a wasteful number, since it uses less digits than its factorization.

1265005168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 1265005168 is about 35566.9111394285. The cubic root of 1265005168 is about 1081.5105656987.

The spelling of 1265005168 in words is "one billion, two hundred sixty-five million, five thousand, one hundred sixty-eight".