1121859432 has 72 divisors (see below), whose sum is σ = 3147434550. Its totient is φ = 360565632.

The previous prime is 1121859421. The next prime is 1121859433. The reversal of 1121859432 is 2349581211.

1121859432 is a `hidden beast` number, since 1 + 1 + 218 + 5 + 9 + 432 = 666.

1121859432 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 1049371236 + 72488196 = 32394^2 + 8514^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1121859433) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1530138 + ... + 1530870.

Almost surely, 2^1121859432 is an apocalyptic number.

1121859432 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 1121859432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1573717275).

1121859432 is an abundant number, since it is smaller than the sum of its proper divisors (2025575118).

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

1121859432 is an equidigital number, since it uses as much as digits as its factorization.

1121859432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1507 (or 767 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 1121859432 is about 33494.1701195895. The cubic root of 1121859432 is about 1039.0732103384.

The spelling of 1121859432 in words is "one billion, one hundred twenty-one million, eight hundred fifty-nine thousand, four hundred thirty-two".