1099812 has 24 divisors (see below), whose sum is σ = 2933056. Its totient is φ = 314208.

The previous prime is 1099807. The next prime is 1099817. The reversal of 1099812 is 2189901.

It is an interprime number because it is at equal distance from previous prime (1099807) and next prime (1099817).

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1099812.

It is not an unprimeable number, because it can be changed into a prime (1099817) 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, 6463 + ... + 6630.

2^1099812 is an apocalyptic number.

1099812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1099812 is an abundant number, since it is smaller than the sum of its proper divisors (1833244).

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

1099812 is a wasteful number, since it uses less digits than its factorization.

1099812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13107 (or 13105 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 1099812 is about 1048.7192188570. The cubic root of 1099812 is about 103.2221303420. Note that the first 3 decimals are identical.

The spelling of 1099812 in words is "one million, ninety-nine thousand, eight hundred twelve".