1121992 has 8 divisors (see below), whose sum is σ = 2103750. Its totient is φ = 560992.

The previous prime is 1121987. The next prime is 1121993. The reversal of 1121992 is 2991211.

It can be written as a sum of positive squares in only one way, i.e., 988036 + 133956 = 994^2 + 366^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1121993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70117 + ... + 70132.

2^1121992 is an apocalyptic number.

It is an amenable number.

1121992 is a deficient number, since it is larger than the sum of its proper divisors (981758).

1121992 is a wasteful number, since it uses less digits than its factorization.

1121992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140255 (or 140251 counting only the distinct ones).

The product of its digits is 324, while the sum is 25.

The square root of 1121992 is about 1059.2412378679. The cubic root of 1121992 is about 103.9114137163.

It can be divided in two parts, 11219 and 92, that added together give a palindrome (11311).

The spelling of 1121992 in words is "one million, one hundred twenty-one thousand, nine hundred ninety-two".