1121580372 has 192 divisors, whose sum is σ = 3260694528. Its totient is φ = 295680000.

The previous prime is 1121580353. The next prime is 1121580377. The reversal of 1121580372 is 2730851211.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121580377) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1599622 + ... + 1600322.

It is an arithmetic number, because the mean of its divisors is an integer number (16982784).

Almost surely, 2^1121580372 is an apocalyptic number.

1121580372 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 1121580372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1630347264).

1121580372 is an abundant number, since it is smaller than the sum of its proper divisors (2139114156).

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

1121580372 is a wasteful number, since it uses less digits than its factorization.

1121580372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790 (or 788 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1121580372 is about 33490.0040609135. The cubic root of 1121580372 is about 1038.9870474890.

The spelling of 1121580372 in words is "one billion, one hundred twenty-one million, five hundred eighty thousand, three hundred seventy-two".