1121423772 has 48 divisors (see below), whose sum is σ = 3018435840. Its totient is φ = 317409792.

The previous prime is 1121423761. The next prime is 1121423777. The reversal of 1121423772 is 2773241211.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121423777) 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, 53397 + ... + 71372.

It is an arithmetic number, because the mean of its divisors is an integer number (62884080).

Almost surely, 2^1121423772 is an apocalyptic number.

1121423772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1121423772 is an abundant number, since it is smaller than the sum of its proper divisors (1897012068).

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

1121423772 is a wasteful number, since it uses less digits than its factorization.

1121423772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124890 (or 124888 counting only the distinct ones).

The product of its digits is 4704, while the sum is 30.

The square root of 1121423772 is about 33487.6659682337. The cubic root of 1121423772 is about 1038.9386892530.

Adding to 1121423772 its reverse (2773241211), we get a palindrome (3894664983).

The spelling of 1121423772 in words is "one billion, one hundred twenty-one million, four hundred twenty-three thousand, seven hundred seventy-two".