1272022672 has 10 divisors (see below), whose sum is σ = 2464543958. Its totient is φ = 636011328.

The previous prime is 1272022657. The next prime is 1272022673. The reversal of 1272022672 is 2762202721.

It can be written as a sum of positive squares in only one way, i.e., 1155728016 + 116294656 = 33996^2 + 10784^2 .

It is not an unprimeable number, because it can be changed into a prime (1272022673) 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, 39750693 + ... + 39750724.

Almost surely, 2^1272022672 is an apocalyptic number.

It is an amenable number.

1272022672 is a deficient number, since it is larger than the sum of its proper divisors (1192521286).

1272022672 is an equidigital number, since it uses as much as digits as its factorization.

1272022672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79501425 (or 79501419 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 1272022672 is about 35665.4268444947. The cubic root of 1272022672 is about 1083.5067403573.

The spelling of 1272022672 in words is "one billion, two hundred seventy-two million, twenty-two thousand, six hundred seventy-two".