1272005288 has 8 divisors (see below), whose sum is σ = 2385009930. Its totient is φ = 636002640.

The previous prime is 1272005281. The next prime is 1272005291. The reversal of 1272005288 is 8825002721.

It can be written as a sum of positive squares in only one way, i.e., 1267502404 + 4502884 = 35602^2 + 2122^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1272005281) 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 as a sum of consecutive naturals, namely, 79500323 + ... + 79500338.

Almost surely, 2^1272005288 is an apocalyptic number.

It is an amenable number.

1272005288 is a deficient number, since it is larger than the sum of its proper divisors (1113004642).

1272005288 is a wasteful number, since it uses less digits than its factorization.

1272005288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159000667 (or 159000663 counting only the distinct ones).

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 1272005288 is about 35665.1831342557. The cubic root of 1272005288 is about 1083.5018044477.

The spelling of 1272005288 in words is "one billion, two hundred seventy-two million, five thousand, two hundred eighty-eight".