1272545716 has 24 divisors (see below), whose sum is σ = 2422993160. Its totient is φ = 581271552.

The previous prime is 1272545711. The next prime is 1272545717. The reversal of 1272545716 is 6175452721.

It can be written as a sum of positive squares in 4 ways, for example, as 910116 + 1271635600 = 954^2 + 35660^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1272545711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121101 + ... + 131188.

Almost surely, 2^1272545716 is an apocalyptic number.

It is an amenable number.

1272545716 is a deficient number, since it is larger than the sum of its proper divisors (1150447444).

1272545716 is a wasteful number, since it uses less digits than its factorization.

1272545716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252403 (or 252401 counting only the distinct ones).

The product of its digits is 117600, while the sum is 40.

The square root of 1272545716 is about 35672.7587382866. The cubic root of 1272545716 is about 1083.6552293355.

The spelling of 1272545716 in words is "one billion, two hundred seventy-two million, five hundred forty-five thousand, seven hundred sixteen".