1271016920 has 32 divisors (see below), whose sum is σ = 2865801600. Its totient is φ = 507337728.

The previous prime is 1271016871. The next prime is 1271016953. The reversal of 1271016920 is 296101721.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14009 + ... + 52328.

It is an arithmetic number, because the mean of its divisors is an integer number (89556300).

Almost surely, 2^1271016920 is an apocalyptic number.

1271016920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271016920 is an abundant number, since it is smaller than the sum of its proper divisors (1594784680).

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

1271016920 is a wasteful number, since it uses less digits than its factorization.

1271016920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66827 (or 66823 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1271016920 is about 35651.3242390798. The cubic root of 1271016920 is about 1083.2210991158.

The spelling of 1271016920 in words is "one billion, two hundred seventy-one million, sixteen thousand, nine hundred twenty".