1084645 has 8 divisors (see below), whose sum is σ = 1326456. Its totient is φ = 851136.

The previous prime is 1084637. The next prime is 1084649. The reversal of 1084645 is 5464801.

It can be written as a sum of positive squares in 4 ways, for example, as 159201 + 925444 = 399^2 + 962^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1084645 - 2³ = 1084637 is a prime.

It is a Duffinian number.

1084645 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1084649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1782 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (165807).

2^1084645 is an apocalyptic number.

It is an amenable number.

1084645 is a deficient number, since it is larger than the sum of its proper divisors (241811).

1084645 is an equidigital number, since it uses as much as digits as its factorization.

1084645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 1084645 is about 1041.4629134059. The cubic root of 1084645 is about 102.7454360268.

It can be divided in two parts, 108 and 4645, that added together give a triangular number (4753 = T₉₇).

The spelling of 1084645 in words is "one million, eighty-four thousand, six hundred forty-five".