1099656 has 40 divisors (see below), whose sum is σ = 3081870. Its totient is φ = 366336.

The previous prime is 1099649. The next prime is 1099669. The reversal of 1099656 is 6569901.

It can be written as a sum of positive squares in only one way, i.e., 656100 + 443556 = 810^2 + 666^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1099656.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 201 + ... + 1496.

2^1099656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1099656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1540935).

1099656 is an abundant number, since it is smaller than the sum of its proper divisors (1982214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1099656 is a wasteful number, since it uses less digits than its factorization.

1099656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715 (or 1702 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 1099656 is about 1048.6448397813. The cubic root of 1099656 is about 103.2172496855.

The spelling of 1099656 in words is "one million, ninety-nine thousand, six hundred fifty-six".