1278081 has 12 divisors (see below), whose sum is σ = 2109952. Its totient is φ = 730296.

The previous prime is 1278047. The next prime is 1278097. The reversal of 1278081 is 1808721.

It is not a de Polignac number, because 1278081 - 2⁹ = 1277569 is a prime.

It is a super-2 number, since 2×1278081² = 3266982085122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278031) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10081 + ... + 10206.

2^1278081 is an apocalyptic number.

It is an amenable number.

1278081 is a deficient number, since it is larger than the sum of its proper divisors (831871).

1278081 is a wasteful number, since it uses less digits than its factorization.

1278081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20300 (or 20297 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 1278081 is about 1130.5224455976. The cubic root of 1278081 is about 108.5224174481.

The spelling of 1278081 in words is "one million, two hundred seventy-eight thousand, eighty-one".