1081779 has 4 divisors (see below), whose sum is σ = 1442376. Its totient is φ = 721184.

The previous prime is 1081777. The next prime is 1081781. The reversal of 1081779 is 9771801.

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

It is an interprime number because it is at equal distance from previous prime (1081777) and next prime (1081781).

It is a cyclic number.

It is not a de Polignac number, because 1081779 - 2¹ = 1081777 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (1081771) 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, 180294 + ... + 180299.

It is an arithmetic number, because the mean of its divisors is an integer number (360594).

2^1081779 is an apocalyptic number.

1081779 is a deficient number, since it is larger than the sum of its proper divisors (360597).

1081779 is an equidigital number, since it uses as much as digits as its factorization.

1081779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360596.

The product of its (nonzero) digits is 3528, while the sum is 33.

The square root of 1081779 is about 1040.0860541321. The cubic root of 1081779 is about 102.6548601048.

The spelling of 1081779 in words is "one million, eighty-one thousand, seven hundred seventy-nine".