1265312160 has 144 divisors (see below), whose sum is σ = 4934756736. Its totient is φ = 289211904.

The previous prime is 1265312123. The next prime is 1265312197. The reversal of 1265312160 is 612135621.

1265312160 is a `hidden beast` number, since 1 + 2 + 653 + 1 + 2 + 1 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1265312123) and next prime (1265312197).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52684 + ... + 72843.

It is an arithmetic number, because the mean of its divisors is an integer number (34269144).

Almost surely, 2^1265312160 is an apocalyptic number.

1265312160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1265312160 is an abundant number, since it is smaller than the sum of its proper divisors (3669444576).

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

1265312160 is a wasteful number, since it uses less digits than its factorization.

1265312160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125555 (or 125544 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 1265312160 is about 35571.2265742974. The cubic root of 1265312160 is about 1081.5980457728.

Adding to 1265312160 its reverse (612135621), we get a palindrome (1877447781).

The spelling of 1265312160 in words is "one billion, two hundred sixty-five million, three hundred twelve thousand, one hundred sixty".