1271720196 has 48 divisors (see below), whose sum is σ = 3338809600. Its totient is φ = 418538016.

The previous prime is 1271720171. The next prime is 1271720201. The reversal of 1271720196 is 6910271721.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1271720196.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65995 + ... + 83058.

Almost surely, 2^1271720196 is an apocalyptic number.

It is an amenable number.

1271720196 is an abundant number, since it is smaller than the sum of its proper divisors (2067089404).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1271720196 is a wasteful number, since it uses less digits than its factorization.

1271720196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149145 (or 149137 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The square root of 1271720196 is about 35661.1861272168. The cubic root of 1271720196 is about 1083.4208507022.

The spelling of 1271720196 in words is "one billion, two hundred seventy-one million, seven hundred twenty thousand, one hundred ninety-six".