1271870 has 16 divisors (see below), whose sum is σ = 2304720. Its totient is φ = 505344.

The previous prime is 1271849. The next prime is 1271903. The reversal of 1271870 is 781721.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1601 + ... + 2259.

It is an arithmetic number, because the mean of its divisors is an integer number (144045).

2^1271870 is an apocalyptic number.

1271870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1271870 is a deficient number, since it is larger than the sum of its proper divisors (1032850).

1271870 is a wasteful number, since it uses less digits than its factorization.

1271870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 859.

The product of its (nonzero) digits is 784, while the sum is 26.

The square root of 1271870 is about 1127.7721401063. The cubic root of 1271870 is about 108.3463390040.

The spelling of 1271870 in words is "one million, two hundred seventy-one thousand, eight hundred seventy".