1270665513 has 24 divisors (see below), whose sum is σ = 2013894792. Its totient is φ = 767190528.

The previous prime is 1270665503. The next prime is 1270665551. The reversal of 1270665513 is 3155660721.

1270665513 is a `hidden beast` number, since 12 + 70 + 6 + 65 + 513 = 666.

1270665513 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 200590569 + 1070074944 = 14163^2 + 32712^2 .

It is not a de Polignac number, because 1270665513 - 2⁴ = 1270665497 is a prime.

It is a super-2 number, since 2×1270665513² = 3229181691855106338, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1270665503) 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, 96256 + ... + 108657.

It is an arithmetic number, because the mean of its divisors is an integer number (83912283).

Almost surely, 2^1270665513 is an apocalyptic number.

1270665513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1270665513 is a deficient number, since it is larger than the sum of its proper divisors (743229279).

1270665513 is a wasteful number, since it uses less digits than its factorization.

1270665513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204985 (or 204982 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 1270665513 is about 35646.3955120290. The cubic root of 1270665513 is about 1083.1212613254.

The spelling of 1270665513 in words is "one billion, two hundred seventy million, six hundred sixty-five thousand, five hundred thirteen".