1081867 has 4 divisors (see below), whose sum is σ = 1108296. Its totient is φ = 1055440.

The previous prime is 1081859. The next prime is 1081891. The reversal of 1081867 is 7681801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7681801 = 41 ⋅187361.

It is a cyclic number.

It is not a de Polignac number, because 1081867 - 2³ = 1081859 is a prime.

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 Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1085867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13153 + ... + 13234.

It is an arithmetic number, because the mean of its divisors is an integer number (277074).

2^1081867 is an apocalyptic number.

1081867 is a deficient number, since it is larger than the sum of its proper divisors (26429).

1081867 is an equidigital number, since it uses as much as digits as its factorization.

1081867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26428.

The product of its (nonzero) digits is 2688, while the sum is 31.

The square root of 1081867 is about 1040.1283574636. The cubic root of 1081867 is about 102.6576436009.

The spelling of 1081867 in words is "one million, eighty-one thousand, eight hundred sixty-seven".