1271528297 has 16 divisors (see below), whose sum is σ = 1433228160. Its totient is φ = 1119267072.

The previous prime is 1271528263. The next prime is 1271528327. The reversal of 1271528297 is 7928251721.

It is a cyclic number.

It is not a de Polignac number, because 1271528297 - 2⁶ = 1271528233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1271528227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94454 + ... + 107072.

It is an arithmetic number, because the mean of its divisors is an integer number (89576760).

Almost surely, 2^1271528297 is an apocalyptic number.

It is an amenable number.

1271528297 is a deficient number, since it is larger than the sum of its proper divisors (161699863).

1271528297 is a wasteful number, since it uses less digits than its factorization.

1271528297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12992.

The product of its digits is 141120, while the sum is 44.

The square root of 1271528297 is about 35658.4954393760. The cubic root of 1271528297 is about 1083.3663529081.

The spelling of 1271528297 in words is "one billion, two hundred seventy-one million, five hundred twenty-eight thousand, two hundred ninety-seven".