1278071 has 8 divisors (see below), whose sum is σ = 1327104. Its totient is φ = 1230040.

The previous prime is 1278047. The next prime is 1278097. The reversal of 1278071 is 1708721.

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 1278071 - 2⁶ = 1278007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1278071.

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 7 ways as a sum of consecutive naturals, for example, 3146 + ... + 3528.

It is an arithmetic number, because the mean of its divisors is an integer number (165888).

2^1278071 is an apocalyptic number.

1278071 is a deficient number, since it is larger than the sum of its proper divisors (49033).

1278071 is an equidigital number, since it uses as much as digits as its factorization.

1278071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501.

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

The square root of 1278071 is about 1130.5180228550. The cubic root of 1278071 is about 108.5221344126.

The spelling of 1278071 in words is "one million, two hundred seventy-eight thousand, seventy-one".