1099992 has 16 divisors (see below), whose sum is σ = 2750040. Its totient is φ = 366656.

The previous prime is 1099961. The next prime is 1099997. The reversal of 1099992 is 2999901.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1099992.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1099997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22893 + ... + 22940.

2^1099992 is an apocalyptic number.

1099992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1099992 is an abundant number, since it is smaller than the sum of its proper divisors (1650048).

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

1099992 is a wasteful number, since it uses less digits than its factorization.

1099992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45842 (or 45838 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 39.

The square root of 1099992 is about 1048.8050343129. The cubic root of 1099992 is about 103.2277612953.

It can be divided in two parts, 109 and 9992, that added together give a palindrome (10101).

The spelling of 1099992 in words is "one million, ninety-nine thousand, nine hundred ninety-two".