1271906 has 8 divisors (see below), whose sum is σ = 2020140. Its totient is φ = 598528.

The previous prime is 1271903. The next prime is 1271927. The reversal of 1271906 is 6091721.

It can be written as a sum of positive squares in 2 ways, for example, as 1229881 + 42025 = 1109^2 + 205^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18671 + ... + 18738.

2^1271906 is an apocalyptic number.

1271906 is a deficient number, since it is larger than the sum of its proper divisors (748234).

1271906 is a wasteful number, since it uses less digits than its factorization.

1271906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37428.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 1271906 is about 1127.7881006643. The cubic root of 1271906 is about 108.3473612341.

The spelling of 1271906 in words is "one million, two hundred seventy-one thousand, nine hundred six".