1271281200 has 120 divisors (see below), whose sum is σ = 4654130688. Its totient is φ = 290576640.

The previous prime is 1271281133. The next prime is 1271281259. The reversal of 1271281200 is 21821721.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67272 + ... + 84071.

Almost surely, 2^1271281200 is an apocalyptic number.

1271281200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1271281200 is an abundant number, since it is smaller than the sum of its proper divisors (3382849488).

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

1271281200 is a wasteful number, since it uses less digits than its factorization.

1271281200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151371 (or 151360 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 1271281200 is about 35655.0305006180. The cubic root of 1271281200 is about 1083.2961712433.

The spelling of 1271281200 in words is "one billion, two hundred seventy-one million, two hundred eighty-one thousand, two hundred".