1272801272 has 8 divisors (see below), whose sum is σ = 2386502400. Its totient is φ = 636400632.

The previous prime is 1272801259. The next prime is 1272801289. The reversal of 1272801272 is 2721082721.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79550072 + ... + 79550087.

It is an arithmetic number, because the mean of its divisors is an integer number (298312800).

Almost surely, 2^1272801272 is an apocalyptic number.

It is an amenable number.

1272801272 is a deficient number, since it is larger than the sum of its proper divisors (1113701128).

1272801272 is a wasteful number, since it uses less digits than its factorization.

1272801272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159100165 (or 159100161 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 1272801272 is about 35676.3405074007. The cubic root of 1272801272 is about 1083.7277653175.

Adding to 1272801272 its reverse (2721082721), we get a palindrome (3993883993).

The spelling of 1272801272 in words is "one billion, two hundred seventy-two million, eight hundred one thousand, two hundred seventy-two".