1084991 has 4 divisors (see below), whose sum is σ = 1148832. Its totient is φ = 1021152.

The previous prime is 1084987. The next prime is 1084997. The reversal of 1084991 is 1994801.

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

It is a cyclic number.

It is not a de Polignac number, because 1084991 - 2² = 1084987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1084997) 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 in 3 ways as a sum of consecutive naturals, for example, 31895 + ... + 31928.

It is an arithmetic number, because the mean of its divisors is an integer number (287208).

2^1084991 is an apocalyptic number.

1084991 is a deficient number, since it is larger than the sum of its proper divisors (63841).

1084991 is an equidigital number, since it uses as much as digits as its factorization.

1084991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63840.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 1084991 is about 1041.6290126528. The cubic root of 1084991 is about 102.7563600746.

The spelling of 1084991 in words is "one million, eighty-four thousand, nine hundred ninety-one".