1271506 has 8 divisors (see below), whose sum is σ = 1913724. Its totient is φ = 633600.

The previous prime is 1271503. The next prime is 1271507. The reversal of 1271506 is 6051721.

It can be written as a sum of positive squares in 2 ways, for example, as 1190281 + 81225 = 1091^2 + 285^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1271503) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 195 + ... + 1606.

2^1271506 is an apocalyptic number.

1271506 is a deficient number, since it is larger than the sum of its proper divisors (642218).

1271506 is a wasteful number, since it uses less digits than its factorization.

1271506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 1271506 is about 1127.6107484411. The cubic root of 1271506 is about 108.3360020381.

The spelling of 1271506 in words is "one million, two hundred seventy-one thousand, five hundred six".