1099671 has 8 divisors (see below), whose sum is σ = 1488384. Its totient is φ = 722040.

The previous prime is 1099669. The next prime is 1099687. The reversal of 1099671 is 1769901.

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

It is not a de Polignac number, because 1099671 - 2¹ = 1099669 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

1099671 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099621) 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 7 ways as a sum of consecutive naturals, for example, 2535 + ... + 2936.

It is an arithmetic number, because the mean of its divisors is an integer number (186048).

2^1099671 is an apocalyptic number.

1099671 is a deficient number, since it is larger than the sum of its proper divisors (388713).

1099671 is an equidigital number, since it uses as much as digits as its factorization.

1099671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5541.

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 1099671 is about 1048.6519918448. The cubic root of 1099671 is about 103.2177189995.

It can be divided in two parts, 1099 and 671, that added together give a triangular number (1770 = T₅₉).

The spelling of 1099671 in words is "one million, ninety-nine thousand, six hundred seventy-one".