1265056016 has 20 divisors (see below), whose sum is σ = 2801195712. Its totient is φ = 542166816.

The previous prime is 1265055997. The next prime is 1265056019. The reversal of 1265056016 is 6106505621.

It is not an unprimeable number, because it can be changed into a prime (1265056019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5647460 + ... + 5647683.

Almost surely, 2^1265056016 is an apocalyptic number.

1265056016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1265056016 is an abundant number, since it is smaller than the sum of its proper divisors (1536139696).

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

1265056016 is a wasteful number, since it uses less digits than its factorization.

1265056016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11295158 (or 11295152 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 1265056016 is about 35567.6259539486. The cubic root of 1265056016 is about 1081.5250562620.

The spelling of 1265056016 in words is "one billion, two hundred sixty-five million, fifty-six thousand, sixteen".