1271057406 has 32 divisors (see below), whose sum is σ = 2558638368. Its totient is φ = 420940800.

The previous prime is 1271057363. The next prime is 1271057419. The reversal of 1271057406 is 6047501721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 979350 + ... + 980646.

It is an arithmetic number, because the mean of its divisors is an integer number (79957449).

Almost surely, 2^1271057406 is an apocalyptic number.

1271057406 is an abundant number, since it is smaller than the sum of its proper divisors (1287580962).

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

1271057406 is a wasteful number, since it uses less digits than its factorization.

1271057406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 1271057406 is about 35651.8920395538. The cubic root of 1271057406 is about 1083.2326003589.

The spelling of 1271057406 in words is "one billion, two hundred seventy-one million, fifty-seven thousand, four hundred six".