1271285142 has 16 divisors (see below), whose sum is σ = 2543003760. Its totient is φ = 423689472.

The previous prime is 1271285111. The next prime is 1271285149. The reversal of 1271285142 is 2415821721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271285149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29838 + ... + 58590.

It is an arithmetic number, because the mean of its divisors is an integer number (158937735).

Almost surely, 2^1271285142 is an apocalyptic number.

1271285142 is an abundant number, since it is smaller than the sum of its proper divisors (1271718618).

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

1271285142 is a wasteful number, since it uses less digits than its factorization.

1271285142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36127.

The product of its digits is 8960, while the sum is 33.

The square root of 1271285142 is about 35655.0857802923. The cubic root of 1271285142 is about 1083.2972909403.

The spelling of 1271285142 in words is "one billion, two hundred seventy-one million, two hundred eighty-five thousand, one hundred forty-two".