1121491392 has 112 divisors (see below), whose sum is σ = 3398641920. Its totient is φ = 319721472.

The previous prime is 1121491391. The next prime is 1121491417. The reversal of 1121491392 is 2931941211.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121491391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1110984 + ... + 1111992.

Almost surely, 2^1121491392 is an apocalyptic number.

1121491392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121491392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1699320960).

1121491392 is an abundant number, since it is smaller than the sum of its proper divisors (2277150528).

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

1121491392 is a wasteful number, since it uses less digits than its factorization.

1121491392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1858 (or 1848 counting only the distinct ones).

The product of its digits is 3888, while the sum is 33.

The square root of 1121491392 is about 33488.6755784698. The cubic root of 1121491392 is about 1038.9595709286.

The spelling of 1121491392 in words is "one billion, one hundred twenty-one million, four hundred ninety-one thousand, three hundred ninety-two".