1125531904 has 72 divisors (see below), whose sum is σ = 2583681408. Its totient is φ = 479354880.

The previous prime is 1125531871. The next prime is 1125531919. The reversal of 1125531904 is 4091355211.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 297384 + ... + 301144.

It is an arithmetic number, because the mean of its divisors is an integer number (35884464).

Almost surely, 2^1125531904 is an apocalyptic number.

1125531904 is a gapful number since it is divisible by the number (14) 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 1125531904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1291840704).

1125531904 is an abundant number, since it is smaller than the sum of its proper divisors (1458149504).

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

1125531904 is an equidigital number, since it uses as much as digits as its factorization.

1125531904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3951 (or 3937 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 1125531904 is about 33548.9478821617. The cubic root of 1125531904 is about 1040.2057975379.

The spelling of 1125531904 in words is "one billion, one hundred twenty-five million, five hundred thirty-one thousand, nine hundred four".