1271685320 has 32 divisors (see below), whose sum is σ = 2863425600. Its totient is φ = 508294848.

The previous prime is 1271685287. The next prime is 1271685377. The reversal of 1271685320 is 235861721.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45941 + ... + 68219.

It is an arithmetic number, because the mean of its divisors is an integer number (89482050).

Almost surely, 2^1271685320 is an apocalyptic number.

1271685320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271685320 is an abundant number, since it is smaller than the sum of its proper divisors (1591740280).

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

1271685320 is a wasteful number, since it uses less digits than its factorization.

1271685320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23717 (or 23713 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 1271685320 is about 35660.6971328380. The cubic root of 1271685320 is about 1083.4109466025.

The spelling of 1271685320 in words is "one billion, two hundred seventy-one million, six hundred eighty-five thousand, three hundred twenty".