1280165416 has 16 divisors (see below), whose sum is σ = 2541505140. Its totient is φ = 602430720.

The previous prime is 1280165377. The next prime is 1280165417. The reversal of 1280165416 is 6145610821.

It can be written as a sum of positive squares in 2 ways, for example, as 1241152900 + 39012516 = 35230^2 + 6246^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (1280165417) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 4706355 + ... + 4706626.

Almost surely, 2^1280165416 is an apocalyptic number.

It is an amenable number.

1280165416 is a deficient number, since it is larger than the sum of its proper divisors (1261339724).

1280165416 is a wasteful number, since it uses less digits than its factorization.

1280165416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9413004 (or 9413000 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 34.

The square root of 1280165416 is about 35779.3993241921. The cubic root of 1280165416 is about 1085.8138163009.

The spelling of 1280165416 in words is "one billion, two hundred eighty million, one hundred sixty-five thousand, four hundred sixteen".