1278271 has 8 divisors (see below), whose sum is σ = 1346400. Its totient is φ = 1211232.

The previous prime is 1278253. The next prime is 1278287. The reversal of 1278271 is 1728721.

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

It is a cyclic number.

It is not a de Polignac number, because 1278271 - 2¹³ = 1270079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278371) 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 7 ways as a sum of consecutive naturals, for example, 3241 + ... + 3613.

It is an arithmetic number, because the mean of its divisors is an integer number (168300).

2^1278271 is an apocalyptic number.

1278271 is a deficient number, since it is larger than the sum of its proper divisors (68129).

1278271 is a wasteful number, since it uses less digits than its factorization.

1278271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545.

The product of its digits is 1568, while the sum is 28.

The square root of 1278271 is about 1130.6064744198. The cubic root of 1278271 is about 108.5277948427.

The spelling of 1278271 in words is "one million, two hundred seventy-eight thousand, two hundred seventy-one".