1271699712 has 108 divisors (see below), whose sum is σ = 3717343084. Its totient is φ = 418037760.

The previous prime is 1271699699. The next prime is 1271699717. The reversal of 1271699712 is 2179961721.

It can be written as a sum of positive squares in 2 ways, for example, as 504631296 + 767068416 = 22464^2 + 27696^2 .

It is not an unprimeable number, because it can be changed into a prime (1271699717) 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, 164412 + ... + 171972.

Almost surely, 2^1271699712 is an apocalyptic number.

1271699712 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 1271699712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1858671542).

1271699712 is an abundant number, since it is smaller than the sum of its proper divisors (2445643372).

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

1271699712 is an equidigital number, since it uses as much as digits as its factorization.

1271699712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7656 (or 7639 counting only the distinct ones).

The product of its digits is 95256, while the sum is 45.

The square root of 1271699712 is about 35660.8989230502. The cubic root of 1271699712 is about 1083.4150336700.

The spelling of 1271699712 in words is "one billion, two hundred seventy-one million, six hundred ninety-nine thousand, seven hundred twelve".