1296271072 has 12 divisors (see below), whose sum is σ = 2552033736. Its totient is φ = 648135520.

The previous prime is 1296271051. The next prime is 1296271079. The reversal of 1296271072 is 2701726921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296271079) 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, 20254204 + ... + 20254267.

It is an arithmetic number, because the mean of its divisors is an integer number (212669478).

Almost surely, 2^1296271072 is an apocalyptic number.

It is an amenable number.

1296271072 is a deficient number, since it is larger than the sum of its proper divisors (1255762664).

1296271072 is an equidigital number, since it uses as much as digits as its factorization.

1296271072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40508481 (or 40508473 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 1296271072 is about 36003.7646920430. The cubic root of 1296271072 is about 1090.3483643683.

Adding to 1296271072 its reverse (2701726921), we get a palindrome (3997997993).

The spelling of 1296271072 in words is "one billion, two hundred ninety-six million, two hundred seventy-one thousand, seventy-two".