1166138 has 4 divisors (see below), whose sum is σ = 1749210. Its totient is φ = 583068.

The previous prime is 1166131. The next prime is 1166141. The reversal of 1166138 is 8316611.

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

It can be written as a sum of positive squares in only one way, i.e., 628849 + 537289 = 793^2 + 733^2 .

It is not an unprimeable number, because it can be changed into a prime (1166131) 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 as a sum of consecutive naturals, namely, 291533 + ... + 291536.

2^1166138 is an apocalyptic number.

1166138 is a deficient number, since it is larger than the sum of its proper divisors (583072).

1166138 is an equidigital number, since it uses as much as digits as its factorization.

1166138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583071.

The product of its digits is 864, while the sum is 26.

The square root of 1166138 is about 1079.8786968915. The cubic root of 1166138 is about 105.2567563739.

The spelling of 1166138 in words is "one million, one hundred sixty-six thousand, one hundred thirty-eight".