1275871428 has 36 divisors (see below), whose sum is σ = 3473206828. Its totient is φ = 392575680.

The previous prime is 1275871411. The next prime is 1275871459. The reversal of 1275871428 is 8241785721.

1275871428 is a `hidden beast` number, since 1 + 27 + 587 + 1 + 42 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 839145024 + 436726404 = 28968^2 + 20898^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1362643 + ... + 1363578.

Almost surely, 2^1275871428 is an apocalyptic number.

1275871428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1275871428 is an abundant number, since it is smaller than the sum of its proper divisors (2197335400).

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

1275871428 is a wasteful number, since it uses less digits than its factorization.

1275871428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2726244 (or 2726239 counting only the distinct ones).

The product of its digits is 250880, while the sum is 45.

The square root of 1275871428 is about 35719.3424911490. The cubic root of 1275871428 is about 1084.5984279876.

The spelling of 1275871428 in words is "one billion, two hundred seventy-five million, eight hundred seventy-one thousand, four hundred twenty-eight".