1155425920 has 128 divisors (see below), whose sum is σ = 3087564480. Its totient is φ = 409804800.

The previous prime is 1155425897. The next prime is 1155425939. The reversal of 1155425920 is 295245511.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 286639 + ... + 290641.

Almost surely, 2^1155425920 is an apocalyptic number.

1155425920 is a gapful number since it is divisible by the number (10) 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 1155425920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1543782240).

1155425920 is an abundant number, since it is smaller than the sum of its proper divisors (1932138560).

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

1155425920 is a wasteful number, since it uses less digits than its factorization.

1155425920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074 (or 4062 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 1155425920 is about 33991.5565986614. The cubic root of 1155425920 is about 1049.3347017493.

The spelling of 1155425920 in words is "one billion, one hundred fifty-five million, four hundred twenty-five thousand, nine hundred twenty".