1272616685 has 16 divisors (see below), whose sum is σ = 1622756592. Its totient is φ = 954777600.

The previous prime is 1272616679. The next prime is 1272616727. The reversal of 1272616685 is 5866162721.

It can be written as a sum of positive squares in 8 ways, for example, as 43903876 + 1228712809 = 6626^2 + 35053^2 .

It is not a de Polignac number, because 1272616685 - 2⁴ = 1272616669 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2756 + ... + 50525.

It is an arithmetic number, because the mean of its divisors is an integer number (101422287).

Almost surely, 2^1272616685 is an apocalyptic number.

It is an amenable number.

1272616685 is a deficient number, since it is larger than the sum of its proper divisors (350139907).

1272616685 is a wasteful number, since it uses less digits than its factorization.

1272616685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53584.

The product of its digits is 241920, while the sum is 44.

The square root of 1272616685 is about 35673.7534470372. The cubic root of 1272616685 is about 1083.6753738635.

The spelling of 1272616685 in words is "one billion, two hundred seventy-two million, six hundred sixteen thousand, six hundred eighty-five".