1166278 has 4 divisors (see below), whose sum is σ = 1749420. Its totient is φ = 583138.

The previous prime is 1166237. The next prime is 1166287. The reversal of 1166278 is 8726611.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 291568 + ... + 291571.

It is an arithmetic number, because the mean of its divisors is an integer number (437355).

2^1166278 is an apocalyptic number.

1166278 is a deficient number, since it is larger than the sum of its proper divisors (583142).

1166278 is an equidigital number, since it uses as much as digits as its factorization.

1166278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583141.

The product of its digits is 4032, while the sum is 31.

The square root of 1166278 is about 1079.9435170415. The cubic root of 1166278 is about 105.2609683843.

It can be divided in two parts, 1166 and 278, that added together give a square (1444 = 38²).

The spelling of 1166278 in words is "one million, one hundred sixty-six thousand, two hundred seventy-eight".