1271985104 has 20 divisors (see below), whose sum is σ = 2654046276. Its totient is φ = 587069952.

The previous prime is 1271985097. The next prime is 1271985109. The reversal of 1271985104 is 4015891721.

It can be written as a sum of positive squares in 2 ways, for example, as 329495104 + 942490000 = 18152^2 + 30700^2 .

It is a super-2 number, since 2×1271985104² = 3235892209595781632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271985109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3057449 + ... + 3057864.

Almost surely, 2^1271985104 is an apocalyptic number.

It is an amenable number.

1271985104 is an abundant number, since it is smaller than the sum of its proper divisors (1382061172).

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

1271985104 is a wasteful number, since it uses less digits than its factorization.

1271985104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6115334 (or 6115328 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 38.

The square root of 1271985104 is about 35664.9001680924. The cubic root of 1271985104 is about 1083.4960734662.

The spelling of 1271985104 in words is "one billion, two hundred seventy-one million, nine hundred eighty-five thousand, one hundred four".