1271944197 has 12 divisors (see below), whose sum is σ = 1863130464. Its totient is φ = 836019240.

The previous prime is 1271944187. The next prime is 1271944231. The reversal of 1271944197 is 7914491721.

It is not a de Polignac number, because 1271944197 - 2⁴ = 1271944181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271944117) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 994623 + ... + 995900.

It is an arithmetic number, because the mean of its divisors is an integer number (155260872).

Almost surely, 2^1271944197 is an apocalyptic number.

It is an amenable number.

1271944197 is a deficient number, since it is larger than the sum of its proper divisors (591186267).

1271944197 is a wasteful number, since it uses less digits than its factorization.

1271944197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1990600 (or 1990597 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 1271944197 is about 35664.3266724608. The cubic root of 1271944197 is about 1083.4844582754.

The spelling of 1271944197 in words is "one billion, two hundred seventy-one million, nine hundred forty-four thousand, one hundred ninety-seven".