1271719680 has 864 divisors, whose sum is σ = 5637123072. Its totient is φ = 237895680.

The previous prime is 1271719667. The next prime is 1271719681. The reversal of 1271719680 is 869171721.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271719681) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 55292149 + ... + 55292171.

It is an arithmetic number, because the mean of its divisors is an integer number (6524448).

Almost surely, 2^1271719680 is an apocalyptic number.

1271719680 is a gapful number since it is divisible by the number (10) 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 1271719680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2818561536).

1271719680 is an abundant number, since it is smaller than the sum of its proper divisors (4365403392).

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

1271719680 is a wasteful number, since it uses less digits than its factorization.

1271719680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93 (or 68 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 42.

The square root of 1271719680 is about 35661.1788924595. The cubic root of 1271719680 is about 1083.4207041697.

The spelling of 1271719680 in words is "one billion, two hundred seventy-one million, seven hundred nineteen thousand, six hundred eighty".