1125581905 has 8 divisors (see below), whose sum is σ = 1543655232. Its totient is φ = 771827568.

The previous prime is 1125581903. The next prime is 1125581923. The reversal of 1125581905 is 5091855211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1125581905 - 2¹ = 1125581903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1125581903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16079707 + ... + 16079776.

It is an arithmetic number, because the mean of its divisors is an integer number (192956904).

Almost surely, 2^1125581905 is an apocalyptic number.

It is an amenable number.

1125581905 is a deficient number, since it is larger than the sum of its proper divisors (418073327).

1125581905 is an equidigital number, since it uses as much as digits as its factorization.

1125581905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32159495.

The product of its (nonzero) digits is 18000, while the sum is 37.

The square root of 1125581905 is about 33549.6930686407. The cubic root of 1125581905 is about 1040.2212007915.

The spelling of 1125581905 in words is "one billion, one hundred twenty-five million, five hundred eighty-one thousand, nine hundred five".