1278167 has 8 divisors (see below), whose sum is σ = 1406592. Its totient is φ = 1151800.

The previous prime is 1278163. The next prime is 1278181. The reversal of 1278167 is 7618721.

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 1278167 - 2² = 1278163 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278163) 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, 998 + ... + 1884.

It is an arithmetic number, because the mean of its divisors is an integer number (175824).

2^1278167 is an apocalyptic number.

1278167 is a deficient number, since it is larger than the sum of its proper divisors (128425).

1278167 is a wasteful number, since it uses less digits than its factorization.

1278167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029.

The product of its digits is 4704, while the sum is 32.

The square root of 1278167 is about 1130.5604804698. The cubic root of 1278167 is about 108.5248514928.

The spelling of 1278167 in words is "one million, two hundred seventy-eight thousand, one hundred sixty-seven".