1271696772 has 48 divisors (see below), whose sum is σ = 3128291712. Its totient is φ = 401280000.

The previous prime is 1271696759. The next prime is 1271696791. The reversal of 1271696772 is 2776961721.

It is a happy number.

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, 3022 + ... + 50522.

It is an arithmetic number, because the mean of its divisors is an integer number (65172744).

Almost surely, 2^1271696772 is an apocalyptic number.

1271696772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1271696772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1564145856).

1271696772 is an abundant number, since it is smaller than the sum of its proper divisors (1856594940).

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

1271696772 is a wasteful number, since it uses less digits than its factorization.

1271696772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47628 (or 47626 counting only the distinct ones).

The product of its digits is 444528, while the sum is 48.

The square root of 1271696772 is about 35660.8577014070. The cubic root of 1271696772 is about 1083.4141987658.

The spelling of 1271696772 in words is "one billion, two hundred seventy-one million, six hundred ninety-six thousand, seven hundred seventy-two".